Respect in regards to what? Getting talent to come there? If other really good players don't want to play there, you can't fault him for their decisions. And without good players, he isn't winning anything except for what he did with what he had. Which, was pretty damn good if you look at it. He had no real second option his entire time in Cleve.
No other player has called a conference to announce his switching of teams, that's right. But is it any different from a player announcing he's going into the draft from college, or high school (In years past) by means of press conference etc? I think not.
Furthermore, other players have done egotistical things once paired, or with the intent to be paired with other great players. Example, Paul Pierce saying he's the best player in the world a little bit ago when the Celtics were rolling and on top of the world.