I think Jimmy tries too hard to be the "this is my team" type of dude. I know his story, I know he's put in serious work...but dudes didn't f*ck with him on the Bulls (the young guys respected Rondo more) and it seems to be the same here.
It's something about Jimmy that rubs guys the wrong way.
Plus I saw him straight up quit in games when he was disgruntled in Chicago.