Not everyone agrees that it's a problem. Teams have won titles with players more vocal and more disruptive that Cuz. Draymond Green is a modern example. I'd rather have an emotional player that goes overboard from time to time than a player that never appears to care regardless what happens on the court. But that's just me.
As I've said numerous times, if the Kings hadn't blown nearly all of the draft picks they've had during Cousins tenure, we very likely wouldn't be having this discussion. In 2009, they had the worst record in the NBA -- before Cuz got there. Since adding Cuz in 2010, they never added much of anything else. When you're in the lottery every single year since 2006 and can't attract worthwhile FA, you can't afford to miss in the draft and the Kings not only did that, but took it to another level.
The Kings didn't win when Isaiah Thomas was on the roster either. Neither did Phoenix for the short time he was there. But when he magically joined a competent franchise, he suddenly becomes a key piece of a 53 win team. The one constant during the past 11 years has been the incompetence and instability of ownership and the front office. That above anything else is why this team has continued to lose. Perhaps that has started to change since the arrival of Vlade, Cantanella and Perry. But it's not because DeMarcus Cousins was here or because he's gone now. Or even because you didn't like his attitude. The losing and dysfunction started 4 seasons before his name was called on draft night 2010. The problem has always been much larger than 1 player. That's what most don't want to acknowledge.
If the Kings start winning next season or the season after that, it will be because they finally drafted correctly and managed to collect more than a few good players. And, most of all, because they started functioning like a legit NBA front office. If DeMarcus was suddenly added to the roster tomorrow, it wouldn't change any of that.
The Warriors DID win titles with Draymond Green. And his teammates have called him the "heart and soul" of the team. But (1) he wasn't also the best player to where the team fell apart if he went off the rails and (2) those other stars could often help manage him when he flared up.
For the Kings Cousins was THE guy. It's hard to win when your franchise player/star can't control his emotions and lacks the emotional toughness to play through stretches when he isn't getting calls etc. I've long said that Cousins would be at his best alongside another star where he was the 2nd banana. To an extent that is what is happening in New Orleans, but I think Boogie would be better off with a star PG or wing rather than a fellow big as the main guy. But we'll see.
And yes, the front office finally DID get away from being completely dysfunctional. But as I said early last season, it was already too late. If the team didn't trade Cousins they would likely have missed the playoffs AND lost their 1st round pick. They wouldn't have a single PG under contract and anything but roleplayers signed around Cousins.
So instead of Hield, Fox, Jackson, Giles, and Mason they'd likely have Mason.
And while I like the potential of Skal, Cauley-Stein, Papagiannis, and Richardson, they wouldn't have helped much in putting a winning team around Cousins. Firstly, they are still very young guys (WCS not as much, but the other three for sure) and not near being impact players (if they ever get there) and secondly because three of them are bigs which doesn't make them as useful around Cousins as PGs and wings would be.
Years of ineptitude set up a season like this last one where there wasn't any good path forward with DeMarcus. At best they would have signed more vets around Cousins to give it another try with almost certainly the same results as we saw this season. There just wasn't any way to get from where we were to where we want to be short of some miracle drafting.
Hitching the wagon to Boogie at $40 million a season for five years wasn't going to get the Kings out of the basement.