I am having a lot of issues with Illustrator 2021 after Big Sur upgrade.

Directional tool continues to change on it's own, and duplicates.
Pencil tool gets stuck on straight line and won't allow me to change it.
Object/Transform/Reflect causes a duplicate, and won't transform until I delete the copy.
Cannot click off to deselect an object. I have to go to menu to deselect all.
Keeps automatically checking Perspective Grid, snap to grid. I don't do it, but I have to go and uncheck it all the time.
When program crashes it doesn't recover anything, even though I have it set to recover. I have lost work.
Selects every object that I touch, and won't release unless I deselect in menu.
I've clicked the scissors tool, and it gives me the Pen + tool.
Click eye dropper, and it is stuck on reverse. Sometimes it won't let me select eyedropper, and keeps giving me Measuring Tool.
Directional tool changes on it's own to the +, and won't let me change it back.
It really has been difficult to work with the program ever since the upgrade. I have noticed when the tools are stuck, if I hold down the shift key and click the tool again, it changes back to normal. But selecting an object, and trying to release doesn't work. It ends up selecting everything, and have to use the menu to deselect. Please help!