There's definitely some compelling evidence to the contrary on that. When he left Kansas, head coach Bill Self raved about what a great kid, hard worker, and selfless teammate White was. Paraphrasing, he said something along the lines that even though he was transferring, White would always be welcome back to Lawrence with open arms, in any capacity, down the road because he was such a great kid.
That's a far cry from the standard boiler plate press release when players usually transfer - "we wish him the best in future endeavors..."
Somebody also posted a video from mid-season last year, with White gearing up for the Maryland game [they were ranked #2 at the time]. Interspersed with the game footage, they also had interviews with some of his teammates. One of them in particular was a guard who had swapped numbers with White. During the year White had to redshirt as a transfer, he asked the kid early on if he could have #3, and the guy rebuffed the idea. Why would he want to give up his number? But over the course of the next year, the player said that White proved to be one of the greatest teammates he ever had, and a good friend, and before the next year, he volunteered to give up #3 so that White could have it.
I'm not suggesting that your concerns are invalid--on paper, I can see how one might reach that conclusion. But like I said, there seems to be quite a bit of contradictory evidence from his past coaches and teammates that suggests otherwise.
I don't blame this kid one bit for seeking to exploit the fifth-year transfer rule to land at a contending program--he's earned that as a graduate. But I don't take that as "evidence" that he doesn't play well with others on the court, nor him transferring from Kansas as a sign that he's all about himself or strictly out to get his. He left Kansas because he was stuck behind Wiggins, McLemore, and then Oubre. He was a top 50 recruit and didn't want to be a career backup. Nothing wrong with that.