We don't know all of what went down. But reportedly one source of friction was that KZ's brother wanted a formal position with Los Knix. At the first mention of that, I had advocated making him one of our Euro-scouts, to appease him, get him away from KZ, keep KZ happy, and maybe he could help dig up another Baltic player for us. There was also Phil firing KZ's main strength&development coach. Hiring novice Fizdale, a big BS-er, probably wasn't reassuring.
There's a lot the Knix did wrong, including trying to implement Phil's Triangle, which players generally don't like and have a hard time learning. Which in a weird way made it more Phil's team than KZ's. Phil taking offers on KZ was likely the tipping point.
The reality of the NBA is that one or two top tier players can change a franchise's fortunes dramatically. KZ has the size and skill set to transform a team into long term winning. There aren't too many high-level 2-way players. Not many 20+ point scorers who play good defense. [of the 45 players scoring more than 18 points, I count 11, including KZ, as + defenders. So KZ likely is or will be one of the Top 10 two-way players in the game. Caveat: I didn't bother to scan further down the scoring list or rank the 2-way guys]
So you have to do what is necessary to make a young developing stud like KZ happy and retain him. The rules are set up so teams can keep their rooks for a long time. Extra year and bigger raises = extra guaranteed money.
And if you want/have to move your franchise cornerstone, you have to wait til you can get a high level quality return. Instead DAL just offered a slightly upgraded version of the TyC trade, and we rushed into it (DeAndre3000/Dalembert; Wes Mathews/Ellington; Jr. Smith/Larkin&Jose; plus two 1st round picks/two 2nd round picks). Right now all we got was the enigmatic Smith Jr, having his worst pro season, with his head elsewhere. And DAL sure isn't concerned about giving up their '21 & '23 pick for KZ. Picks that'll likely fall around the 18th pick or worse.
So who cares what blame lies on the Zinger camp, it was a calamity to lose KZ for junkola. Ya gotta keep your franchise players content. Ya gotta keep your franchise players. We needed KZ much more than he needed us. We're screwed, he's doing well. Etc.