If you don't think that an issue in the locker room can cause an issue on a team then I question whether you actually played competitive baseball at a high level like you said.
Team chemistry is probably the most overated thing in sports history. When teams struggle, it's team chemistry. When they are good, chemistry is good. Probably the only outliers are the Mets of the mid 80s and the Phillies of the early 90s.
You think the Bulls had good team chemistry? Jordan beat the **** out of guys.
The best team I was ever on was full of guys that hated each other. Fist fights and arguments every day. The worst team I was on all went out for beers after the game.