Why was (is) Cleveland upset at Lebron James for leaving?

Well, many of the guys you mentioned were traded, they didnt leave of their own accord. Lebron was born and raised in Ohio and had played his whole career there for one thing. Another is the way he left by doing it on a TV special. That was really the only problem I had with his leaving. He didnt have to make a big production out of it. Its like your girlfriend leaving you for another guy and she decides to announce it on a TV special.