Ya, it can be a combination of little reasons and not one single reason.
Note the Tweet you're showing is from February 5, day after the game. That was his impression at that time, but maybe today he wouldn't break it down quite like that.
The benching isn't super weird right off the bat, because you assume the reasons for it would come to light, and that it would be confirmed that he wasn't healthy or what rule he broke etc. But then if things don't get confirmed and teammates all support him and don't seem to understand why he didn't play, it grows more weird and mysterious.
Today I think most people would put things like "Bill wanted to make a statement" somewhere in the pie chart.