Please determine if the same problems occur in "Safe Mode": How to use safe mode on your Mac - Apple Support.
Other processes 225.03 % (?)
Those "other" processes are an obvious contributing factor that Activity Monitor will readily identify. We can address that later. First please confirm whether your Mac works more or less normally in "Safe Mode". Use it for a few minutes; long enough to draw a conclusion. Then restart your Mac normally (not "Safe Mode") and determine if the same problems return. Write back with your observations for some additional troubleshooting.
Last backup: 2022-01-21 15:34:04
Is there a reason you stopped using Time Machine? You really ought to create a more recent backup.