How to use Etre Report

First a little education. Mac OS is EXTREMELY secure and does not benefit from nor does it require any antivirus, cleaning or ANY other third party "maintenance" apps. Almost all of these will have the exact opposite effect you desire, they will make Mac OS slow, unstable and appear buggy. If simply kept up-to-date and otherwise left alone Mac OS will remain secure, stable and fast.

You installed what most experienced users on these forums consider malware, CleanMyMac. Please locate the developers instructions to uninstall and please uninstall it.

Also, your computer has not been restarted in 31 days, a simple restart may help.

Finally, you bought a base model iMac with 8GB of un-upgradeable RAM. It also has a glacially slow 5400 RPM. There is nothing you can do about the RAM, however if you want to make the computer quicker buy an external SSD, install Mac OS on it and migrate from the internal HD to the SSD. Then erase the internal HD and use it for additional storage. That will improve performance substantially. If you want help selecting an external SSD and enclosure please let us know.

In addition to what rkaufmann87 has pointed out, you have some software installed that is much older than the computer. probably due to using Migration Assistant:

Launch agents:

[Other] com.randmcnally.rmdock.plist (? eedb9f40 - installed 2011-09-29)

[Running] com.rim.BBLaunchAgent.plist (? dcf2726d - installed 2009-12-21)

[Running] com.seagate.SeagateStorageGauge.plist (? 502453cc - installed 2010-11-22)

[Loaded] org.macosforge.xquartz.startx.plist (? 2748570a - installed 2012-06-01)

Launch Daemons:

[Running] com.rim.BBDaemon.plist (? 9f895e8a - installed 2009-11-20)

[Loaded] org.macosforge.xquartz.privileged_startx.plist (? 77ab826e - installed 2012-06-01)

Internet Plug-ins:

ToontownBundleManager: (? - installed 2006-11-28)

Unity Web Player: UnityPlayer version 2.6.1f3 (? - installed 2009-11-30)

Flip4Mac WMV Plugin: 2.3.8.1 (? - installed 2011-01-13)

net.juniper.DSSafariExtensions: (? - installed 2011-09-20)

Third-party Preference Panes:

Flip4Mac WMV (installed 2011-01-13)

Java (installed 2019-07-18)

MacFUSE (installed 2008-12-19)

Microsoft Keyboard (installed 2011-02-20)

Microsoft Mouse (installed 2011-02-20)

Old software can slow the computer because it may be using code that has been revised or deprecated in newer macOS versions. A good rule: If you use it, upgrade it to current; if you don't use it, dump it."