Anyway to remove them or avoid them entirely?
I don't think you can remove any games from your archive, not even greeter games. They can be avoided entirely from this point onward, of course, by not playing any more greeter games, but I think that's the only option.
I get a lot of "won" games when I play new folks under the Welcome to Chess.com. Many opponents make one or two moves and then abandon the game after two/three days. The only way to remove them is to "claim a win by time". I don't need these cluttering up my recent games folder. Anyway to remove them or avoid them entirely?