Photoshop 22.x on Big Sur is a bust
Since installing 22.x on Big Sur, I've had so many problems that I've had to reinstall 21.x.
1) file windows up small, and you have to use command +1 to resize the window to see the full image.
2) healing brush is broken. after using the healing brush, the grey brushmark never goes away. You need to use the space bar, or open/close the window to see if it "healed". It lags. It's too annoying to even use.
3) PS lags. It's slow. Especially healing tools, quick mask.
I've had to reinstall 21.x. Honestly version 22.x is the worst upgrade I've ever had. It's broken so many things it's not usable. I have PS installed on four Macs, and all display varying degrees of this behaviour.