Hmm... interesting you mention terminal really slow to open up. I still experience this also - the first time I open a terminal (only), and only if I try to open it shortly after I boot the machine. I've tried several times to find out why this is, but without success (without a terminal it's hard to find out what's blocking the terminal...)

The other thing I dumped was the latest Ubuntu Studio Chromium install, because it installs a snap, which is laggy to fire up, which also drove me crazy. I use the Mint chromium build now, which is a real native build, not a snap, and works great.