First and foremost the quality of this athlete is irrelevant to the legal question of whether he was 1)bullied by teammates 2)whether this bullying was organized/institutional 3)whether he was assaulted by the head coach (this is a given - the boy was touched, violently enough to be thrown to the ground) 4)whether the coach knew of the bullying, encouraged it or even directed it 5)whether the boy is in a protected class under Federal and State Law. Discovery will flesh these facts out. His mental state has no bearing on the assault claim, (unless shown that he was delusional/hallucinating) and no "self-defense" allegation has been offered to describe/excuse the coach's offensive contact. The University seems to be alleging a pattern of irregular behavior, and if this is so, their duty of care would be higher. (You hear an athlete under your care is suicidal - you bring him in to the office to dress him down and revoke his scholarship? You end up grabbing him - he ends up on the floor...sent to the hospital?) Something appears really wrong. Were parents contacted by the school or coach at all along the way?
As for whether he was talented and a worthy recruit to a PAC12 school - To assert that he is not is either ignorance or willful misrepresentation. His best time as a high schooler would have been very close to scoring in the PAC12 championships recently. Coaches recruit track athletes with the goal of scoring in League Championships. Schools like USC may recruit sprinter-heavy, but no one in the PAC 12 is sending out "books only" meatballs in school colors. No school is going to able to recruit an All-American steeper with a paltry offer. Assuming that this athlete's performances improved over 4 years, he would have been projected to run in NCAA regionals and likely finals with good racing luck. Regional times are near impossible to meaningfully compare because they do not account for critical variable of weather (45 degrees wind and rain vs. 75 degrees sunny zero humidity). Nor do these times account for the difference between the "altitude schools" and the rest of the valley runners.
As far as steeplers - they are the rarest breed of distance runners. Tens of thousands of kids will run fast. Out of that group perhaps two will be able to maintain that same speed while clearing 28 36" non-collapsible barriers. Not to mention the water jump where the kids will have their heads higher than Zion Williams on a dunk, while traveling 15' over water - with other athletes colliding with them. Good steeplers possess tremendous strength, balance and agility rarely found in pure distance runners. They must also possess the mentality of athletes playing collision sports like football. This is why college steeplers are literally scouted and recruited from every continent except Antartica. College coaches love NY steeplers because they are proven at 3K. No other state runs 3K, and there are scores of great 2K steeplers who fail at the longer distance. Nobody who knows anything about HS/College running would denigrate a performance of a top NY distance runner. The top 5 or 6 steeplers in NY always get recruited to top track programs across the nation. They have their pick from abundant choices.
As far as the quality and character of this particular athlete - He ran his fastest HS time in 105 degree heat in Sacramento (US Junior Nats - 3rd place). He became HS All-American after a crash in the water pit in 95 degrees in humid Greensboro. As an athlete he is tough as nails and certainly not a quitter at all.
Something is very wrong here. We await details. But please don't be so stupid as to jump to conclusions, especially on irrelevant topics and with obviously limited or no knowledge about this case in particular, the applicable legal standards, college track and field, and recruiting.