iMac late 2015 way too slow

Hi everyone,
is been now few days iMac is super slow like very very slow, I've ran etrecheck few times but as non-technical guy I can't see what's really going on, truly hope someone can help me, now any app is starting to freeze or beachballing at launch very weird and latest report indicated "below average" performance.
I've tried working with only one browser open, still no go. Please help me, I really need my computer to keep up my job!

I've attached full report here:

EtreCheck version: 4.1 (4A162)

Report generated: 2018-03-11 23:24:05

Download EtreCheck from https://etrecheck.com

Runtime: 9:20

Performance: Below Average

Problem: Computer is too slow

Major Issues:

Anything that appears on this list needs immediate attention.

No Time Machine backup - Time Machine backup not found.

Minor Issues:

These issues do not need immediate attention but they may indicate future problems.

Unsigned files - There is unsigned software installed. It appears to be legitimate but should be reviewed.

Low performance - EtreCheck report took over 5 minutes to run. This is unusual.

Corrupt hosts file - Hosts file is corrupt.

32-bit Apps - This machine has 32-bits apps that may have problems in the future.

Hardware Information:

iMac (Retina 5K, 27-inch, Late 2015)

iMac Model: iMac17,1

1 4 GHz Intel Core i7 (i7-6700K) CPU: 4-core

8 RAM At maximum

BANK 0/DIMM0

4 GB DDR3 1867 ok

BANK 0/DIMM1

Empty

BANK 1/DIMM0

4 GB DDR3 1867 ok

BANK 1/DIMM1

Empty

Video Information:

AMD Radeon R9 M395 - VRAM: 2048 MB

iMac 5120 x 2880

Drives:

disk0 - APPLE HDD ST2000DM001 2.00 TB (Mechanical)

Internal SATA 6 Gigabit Serial ATA

disk0s1 - EFI [EFI] 210 MB

disk0s2 - U******d [Core Storage Container] 2.00 TB

disk0s3 - Recovery HD [Recovery] 650 MB

disk1 - APPLE SSD SM0128G 121.33 GB (Solid State - TRIM: Yes)

Internal PCI 8.0 GT/s x4 Serial ATA

disk1s1 - EFI [EFI] 210 MB

disk1s2 - U******d [Core Storage Container] 120.99 GB

disk1s3 - B*******X [Recovery] 134 MB

Mounted Volumes:

Network:

Interface en0: Ethernet

Interface en1: Wi-Fi

802.11 a/b/g/n/ac

One IPv4 address

Interface en4: Bluetooth PAN

Interface bridge0: Thunderbolt Bridge

System Software:

OS X El Capitan 10.11.6 (15G19009)

Time since boot: About 3 hours

System Load: 1.62 (1 min ago) 1.63 (5 min ago) 1.64 (15 min ago)

Configuration Files:

/etc/hosts - Count: 0 - Corrupt!

Security:

System	Status
Gatekeeper	Mac App Store and identified developers
System Integrity Protection	Enabled

Unsigned Files:

Launchd: /Library/LaunchDaemons/com.oracle.java.Helper-Tool.plist

Executable: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Resources/Helper-Tool

Details: Exact match found in the whitelist - probably OK

Launchd: /Library/LaunchAgents/com.oracle.java.Java-Updater.plist

Executable: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Resources/Java Updater.app/Contents/MacOS/Java Updater -bgcheck

Details: Exact match found in the whitelist - probably OK

32-bit Applications:

Name	Version
{2614BC86-757D-4293-9E25-E4E16F370A9E}	9.0.0.19
SecurityFixer	10.8
SA Color Finesse 3 UI	3.0.12(304)
Adobe After Effects Render Engine
Adobe Application Manager	10.0.0.49
Wish	8.4.19
CINEMA 4D QT Agent	1.0
Uninstall Product	9.0.0.65
AAMLauncherUtil	10.0.0.49
AAM Registration Notifier	3.0.64.0
Adobe Flash Player Install Manager	28.0.0.161
Setup	9.0.0.65
quicklookd32	5.0
DVD Player	5.8
Adobe Desktop Service	3.9.5.353
uTorrent	1.8.7
Compressor	4.2.2
AAM Updates Notifier	9.0.0.281
{76AE579A-05AC-11E5-933C-9CF835776563}	9.0.0.61
InkServer	10.9

System Launch Agents:

[Not Loaded]	7 Apple tasks
[Loaded]	153 Apple tasks
[Running]	80 Apple tasks

System Launch Daemons:

[Not Loaded]	44 Apple tasks
[Loaded]	155 Apple tasks
[Running]	92 Apple tasks
[Other]	One Apple task

Launch Agents:

[Not Loaded]	com.adobe.AAM.Updater-1.0.plist (? ffb65062 - installed 2018-02-25)
[Not Loaded]	com.adobe.GC.Invoker-1.0.plist (Adobe Systems, Inc. - installed 2018-01-29)
[Loaded]	com.oracle.java.Java-Updater.plist (? e77fe177 - installed 2017-12-20)
[Other]	com.adobe.ARMDCHelper.cc24aef4a1b90ed56a725c38014c95072f92651fb65e1bf9c8e43c37a2 3d420d.plist (Adobe Systems, Inc. - installed 2018-02-14)

Launch Daemons:

[Loaded]	com.adobe.ARMDC.SMJobBlessHelper.plist (Adobe Systems, Inc. - installed 2018-02-14)
[Loaded]	com.fxfactory.FxFactory.helper.plist (? 1ec1ea62 - installed 2016-12-11)
[Loaded]	com.adobe.fpsaud.plist (Adobe Systems, Inc. - installed 2018-02-02)
[Loaded]	com.oracle.java.Helper-Tool.plist (? e3fefdd2 - installed 2017-12-20)
[Running]	com.adobe.agsservice.plist (Adobe Systems, Inc. - installed 2018-01-29)
[Loaded]	com.adobe.ARMDC.Communicator.plist (Adobe Systems, Inc. - installed 2018-02-14)

User Launch Agents:

[Loaded]	com.google.keystone.agent.plist (Google, Inc. - installed 2018-02-04)
[Not Loaded]	com.adobe.GC.Invoker-1.0.plist (Adobe Systems, Inc. - installed 2018-01-29)
[Loaded]	com.skype.skype.shareagent.plist (Skype Communications S.a.r.l - installed 2017-10-02)
[Loaded]	com.adobe.AAM.Updater-1.0.plist (? 0 - installed 2018-02-25)
[Loaded]	com.bittorrent.uTorrent.plist (BitTorrent, Inc - installed 2016-03-18)

User Login Items:

iTunesHelper Application (Apple, Inc. - installed 2018-01-24)

(/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

Internet Plug-ins:

AdobeAAMDetect: 3.0.0.0 (installed 2017-03-30)

FlashPlayer-10.6: 28.0.0.161 (installed 2018-02-06)

QuickTime Plugin: 7.7.3 (installed 2018-01-31)

AdobePDFViewerNPAPI: 17.012.20098 (installed 2018-02-25)

AdobePDFViewer: 18.011.20038 (installed 2018-02-25)

Flash Player: 28.0.0.161 (installed 2018-02-06)

Default Browser: 601 (installed 2016-07-23)

JavaAppletPlugin: Java 8 Update 161 build 12 (installed 2018-01-19)

User Internet Plug-ins:

CitrixOnlineWebDeploymentPlugin: 1.0.105 (installed 2013-04-26)

ZoomUsPlugIn: 4.0.35295.0605 (installed 2017-06-08)

Safari Extensions:

AdBlock.safariextz - BetaFish, Inc. - https://getadblock.com (installed 2018-01-16)

Adblocker for Finland.safariextz - Juvander Consulting Oy - https://www.juvander.fi (installed 2017-11-02)

Adblock Plus.safariextz - Eyeo GmbH - https://adblockplus.org/ (installed 2017-02-20)

Ka-Block!.safariextz - David Graham & Josh Peek - http://kablock.com (installed 2018-02-05)

StopAll Ads.safariextz - Tweaking Technologies - http://www.stopallads.com/ (installed 2017-11-02)

AdBlock Ultimate.safariextz - Secure Download - https://adblockultimate.net/ (installed 2017-11-02)

3rd Party Preference Panes:

Flash Player (installed 2018-02-02)

Java (installed 2018-01-19)

Time Machine:

Time Machine Not Configured!

Top Processes by CPU:

Process (count)	Source	% of CPU
WindowServer	Apple	3
kernel_task	Apple	1
NotificationCenter	Apple	0
AppleIDAuthAgent (2)	Apple	0
CrashReporterSupportHelper	Apple	0

Top Processes by Memory:

Process (count)	Source	RAM usage
kernel_task	Apple	783 MB
Finder	Apple	494 MB
mds_stores	Apple	408 MB
cfprefsd (2)	Apple	235 MB
mdworker (7)	Apple	112 MB

Top Processes by Energy Use:

Process (count)	Source	Energy usage (0-100)
WindowServer	Apple	4
SystemUIServer	Apple	0
NotificationCenter	Apple	0
AppleIDAuthAgent (2)	Apple	0
CrashReporterSupportHelper	Apple	0

Virtual Memory Information:

Available RAM	4.44 GB
Free RAM	1.88 GB
Used RAM	3.56 GB
Cached files	2.56 GB
Swap Used	0 B

Diagnostics Information (past 7 days):

2018-03-11 22:15:00 quicklookd.app Crash

quicklookd seems struck trying to quit crashingabort called

2018-03-11 19:10:18 EtreCheck 2.app Hang

2018-03-10 08:17:15 ntpd Crash

abort called

2018-03-09 16:54:52 Mail.app Crash

Terminating app due to uncaught exception NSInternalInconsistencyException reason: Got EXPUNGE but EXISTS is already 0abort calledterminating with uncaught exception of type NSException

2018-03-05 10:09:51 Firefox.app CPU

End of report