Help. Mac is nuts since last update.

So I don't know what's wrong with the last update but it definitely messed up my computer. All apps keep failing, and they keep restarting because of "errors". That's acceptable, but yesterday I tried using my AirPods and the bluetooth wouldn't work at all. I wasn't able to turn it off, and when I went into settings it didn't show not even one name of the many bluetooth devices I normally use. So I wasn't able to use anything bluetooth related. To solve the bluetooth issue I tried to restart the computer and yeah it solved the bluetooth issue, but it showed a loading animation and took a while to start. To top that off, my wallpaper was gone, and so were some pictures I had as icons for my files.

Has anyone been having this same kind of trouble since the last update? I've been a long time Apple user, but I just started using Mac this year, and it's been giving me so much trouble.