1) I don't hate Jefferson. He's a good guy. I hate him as a player on the Jazz.
2) You have to have not been paying attention to not have seen any reasons by me or others to ditch the guy.
3) It's pretty simple; he's got a flickering 40-watt lightbulb upstairs and doesn't play a WINNING game.
Winning is FAR more than scoring points by yourself. He's a plainly sloppy passer, in addition to making poor reads, not recognizing double-teams, and not knowing what to do when they happen. His shot-selection is sometimes horrible and he's not a versatile scorer. He's bad on the pick-and-roll, the first few months were possibly worse than anyone I've ever seen (or at least that I've paid attention too). It took him 6.5 seasons to learn how to catch a ball while moving. He's not great at setting picks in general, but his understanding of the nuances of the plays that come from it is completely non-existent. HE'S SLOW, more mentally than anything else. He makes a decision on what he's going to do with the ball regardless of what the defense or offense is doing. He requires an acre down low to operate, thus obliterating the motion of the offense, in other words, it stops when he touches the ball. Even if the Jazz HAD the shooters to punish double-teams on the low-block, he has such bad court-awareness and fluidity that it wouldn't matter. He's not a bad shooter, but it isn't a big enough or strong enough part of his game to open the paint at all, besides that he is a poor passer and wouldn't be able to make the most of it even if he did open the paint. He's an absolute lunk in transition on both sides of the ball. Does nothing there. Doesn't do much off-the-ball generally, really needs the ball in his hands to be effective and isn't very good when others create for him. Isn't good at getting open and making a quick bucket on cross-screen plays because of his lack of understanding of a real set and because he's generally slow. His shooting is limited to spot-up, he doesn't really do it on-the-move or fading (which might be a good thing that he doesn't try). His push-shot is ugly and when it's not on it's horribly off. And he doesn't get to the line. Long story short, he can do one thing well but it hurts the rest of the team since he doesn't understand how to turn that into something that helps others.
He blocks some shots and did a good job containing his assignment this year, but his general awareness of schemes or his speed rotating was poor. His 2 blocks per game don't make up for the shots he gave up because he got lost.
His fundamentals are very poor across the board.
The Jazz allow A LOT fewer points when he's off the court. The Jazz outscore their opponents barely when he's off the court (+0.6) and get outscored when he's on it (-3.3). The Jazz rebounding rate is worse when he's on the court as well.
But yeah, he can put up some shots and make some. There are the reasons why I don't like Jefferson on the Jazz. His losing isn't a pure coincidence, especially when you consider that when he became THE big that the Jazz offense fell apart and the team eventually imploded. After that point, you would expect his stats to explode as the offense would be catered to his one-dimensional game, and unsurprisingly, that's exactly what happened.
I really hope you read this and understand it because even though I haven't completely stopped ranting about this, I'm actually quite sick of saying the same thing over and over. As surprising as that is.
