Beachballing, Etrecheck - Poor Performance

With only 4GB of RAM Catalina is pretty much hogging all available resources. You have several high resource applications such as MS Office and Google Chrome as well. You also have a number of extras - plug-ins etc. To get the best possible performance with your computer you'll need to pare things down: run one or two applications at a time, for example. I'd dump Chrome since it is a known resource hog. You might also consider backing up the computer and then doing a clean install, installing only the applications you absolutely need and only the plug-ins you need.

You also have bit torrent installed which opens the door to malware and other unwanted things if you are downloading anything that costs money elsewhere. And, as already mentioned, I have no idea how you are running anything with only 4 GB RAM.