I was taking a look at Tyler's official bio and some things stuck out at me:
He is 22 years old
He was Student Council President at Shattuck-St. Mary’s, President of Student Activities, and the Headmasters Advisory Committee Senior Representative.
He was a WCHA All-Academic Team member and U of M Scholar-Athlete as a Sophomore
He was Business and marketing education major
I cannot believe that someone could fall that hard and that fast without any good reason, and from his actions all signs point to some psychological problem. He's at the right age for onset of most mood, anxiety, and personality disorders and he is a college athlete which is stressful on even the most academically inclined students, not to mention social pressure and his own personal goals. As to why things happened this way and why he kept getting second chances, well maybe like most individuals he denies that he has a problem; I think Lucia tried to do the right thing, but if you don't want to believe something you're just not gonna believe it and "throwing him off the team" was the only real way to get Tyler to consider the severity of his present condition in life. I have heard two former Sioux players speak the praises of who Tyler Hirsch was in high school and I'm disinclined to think that 2 years at the U could have simply turned him into a jackass.