Why is Catalina the most unstable OS ever?

I did. Check out my reply to one of the users in this thread.

All I saw was an EtreCheck report. No panic logs.

The two most common reasons for kernel panics are hardware faults and third-party kernel extensions. It could be something in one of Apple's kernel extensions, but most likely not.

You don't have any third-party kernel extensions loaded, so it is most likely a hardware fault.

The panics are Page Faults which are predominately memory related, not necessarily RAM.

You could run Rember or Apple Diagnostics to check your RAM, but that might not be the cause.

It is entirely possible that Brick My Mac "cleaned" something it wasn't supposed to clean and damage the system.

I would erase the drive entirely and reinstall the OS. Test it before installing anything else.

You can also try resetting NVRAM as that can resolve some rare kernel panic causes.

Reset NVRAM or PRAM on your Mac - Apple Support

Install EtreCheck and post the report. Allow full disk access.

https://etrecheck.com/

Use the Additional Text icon under the reply window to paste in the report.

Uninstall CleanMyMac.

Boot into the Recovery volume (boot with the Command + R keys held down) and run Disk Utility to repair the hard drive. Reboot normally to see if that made any difference.

If it still won't boot again boot into the Recovery volume and reinstall the system.

I'd make a backup up the boot drive and then look into erasing the entire drive and reinstalling the system in order to get only one of each volumes.

Does it appear you still have the correct amount of capacity and free space on your working volume?

Please post one of the kernel panic logs. You can find it in /Library/Logs/DiagnosticReports. The name will start with "Kernel."

Open one of them, copy the text, and paste it into the Additional Text area.

You can check to see if you've removed all of the files by downloading and running Find Any File to search for any files with the application's name  and the developer's name in the file name.  For example for CleanMyMac software you'd do the following search: 

1 - Name contains cleanmymac

Any files that are found can be dragged from the search results window to the Desktop or Trash bin in the Dock for deletion.

FAF can search areas that Spotlight can't like invisible folders, system folders and packages.

Eredion wrote:

Any idea how that might've happened?

Could have been an issue that has existed since it was built.

The 2010 MacBook Pros had bad Nvidia graphics cards. The fault didn't show up for many until they upgraded the OS. Even then, it didn't appear for some until later on. They eventually discovered a bad lot of GPUs was the issue and they had a recall.

"CleanMyMac" claims another victim.

Then you probably have a hardware problem.

You might also want to download and apply the macOS Catalina 10.15.4 Combo Update.  This is incase some of the original system files have been damaged by CMM. Can't hurt but certainly might help.

You're going to need to do a search for them. I've never installed it so I don't know where it stores its bits & pieces. I noticed you have BlueStacks installed which allows you to play Android games on a Mac. I don't know if it causes issues in Catalina or not.