Thank you for the Report.
There are no known Viruses in the wild that self replicate and affect macOS. There are Malware and Adware that does affect macOS and are often times downloaded as part of an Application from Third Party UnTrusted Site and get installed along with the Application. For that purpose - Malwarebytes is already installed
Suggest Removing Bitdefender as per Developers Specific Instructions
Suggest Removing Objective-See as per Developers Specific Instructions
nl.nielsmouthaan.daily.launcher From the Apple Sore - this App appears compatible with Catalina 10.15 and no mention of compatible with Big Sur 11.5.2
Silverlight.plugin is outdated and not longer required nor supported.
250.79 GB (Shared - 190.15 GB used, 59.13 GB available, 40.92 GB free) - Is ok but may need to monitor. Normally need to keep 15% = 37.5 GB of the drive as Free Space for everything to function properly
Below are the highlights from the supplied Etrecheck Report
More than one antivirus app - This computer has multiple antivirus apps installed.
BitdefenderVirusScanner.app
one notification
Antivirus software: Apple, Objective-See, and Malwarebytes
com.objective-see.ransomwhere.plist (Objective-See, LLC - installed
250.79 GB (Shared - 190.15 GB used, 59.13 GB available, 40.92 GB free)
Running app: nl.nielsmouthaan.daily.launcher
Plugin: /Library/Internet Plug-Ins/Silverlight.plugin