He's basically on Kyrie's level now. Still a good player as he showed last season, but his trust level is through the floor. Can't be trusted to perform under pressure, can't be trusted to play on a contract he just opted into, makes trade demands not requests. And for they kind of money he's expecting? Who wants that?
ETA: this is a dumb emotional take, but as a Sixers fan I'd rather have Kyrie at this point lol. I'm sure I would regret that though.