(3rd person information!)
I'm good friends with Ryan Lilja's cousin. He talks to Lilja quite often. According to him, Lilja said that Haley constantly belittled Cassel in front of the team. Said he treated Cassel like a child, and that respect was a constant issue. Lilja thought Cassel was a timid dork, but a nice guy. Cassel tried constantly to fire up the team, but nobody really responded when Cassel would go on his fiery tirades.
Again... this is 3rd person info from Lilja's cousin.