My biggest pet peeve - Ctrl plus shift plus v pastes unformatted but right next to it is Ctrl plus shift plus c which starts a call in whatever chat you are in. Also there is no way within ms teams to remove this binding. Wat‽
You should be able to capture this keybinding with autohotkey. I don't have my script handy, on mobile, but you can capture keys based on the active window. These keystrokes aren't passed to the active window, so you could have it take an alternate (or no) action.
People are down voting you but this is very similar to the answer I got from a real employee (as opposed to a v dash) at Microsoft. Their solution was they use something called power toys, which is technically a Microsoft product.
Problem is I've worked at places where I don't have admin access to my own machine and it is more common the you'd think.
“Paste with formatting” is a scourge of a “feature.” I can’t recall ever wanting to actually do that.