This is all speculation so take it for what it's worth. As recently as August of 2021 (right when he'd be starting his senior year of high school), Skyy Clark was a top 10 player in his class as determined by 247composite rankings. I think it's just really hard for a kid to reach that level of heights, and not view yourself as a superstar, future NBA one and done type. Everyone else in the world is probably telling you that, and when you're like 17 years old, well, it can be hard to stay humble. Then he had an injury, and while he was recovering, his "competition" was only getting better. From there, he slipped in the rankings a bit, wasn't quite himself coming back while working on his timing. Kentucky likely told him he wasn't going to start, so he came here, a place he probably felt he was "too good" for at one point, because we were the best available team with an opening. Got his chance, but likely had a tough time coming to grips with the fact that Jayden Epps, a guy he was always a much higher rated recruit than at the same position, was better. Probably remained in denial about. Was given a ton of opportunity, but eventually the coaching staff could say that his play just wasn't good enough to justify leaving in the starting lineup and that it was really hampering the team's ability to achieve success. Was probably told that he was going to have his role reduced. Likely one of the first times he was confronted face to face with the harsh reality, he just wasn't good enough, he wasn't that top 10 player, or even top 30 player that he was once ranked. Rather than accept it, likely blamed the coaching staff for not "using" him properly and took it to mean they were the problem not him. Culture of team-based sacrifice likely wasn't having that kind of attitude either. So he decided to leave.
Hopefully he can find a spot that is the right fit for him. I'm not trying to excuse these kids with giant egos, because at some point they do need to "man up" and accept personal responsibility and understand that sports is a meritocracy, give it enough time and nobody cares how good you were in AAU or where you were ranked as a high school junior, the best players will (before too long) play. However, I do feel bad. There's just so much hype, so much discussion, so many people in their ear telling them they're this and that, and having expectations for what they are going to become. When you have a setback that isn't your fault (injury) at a crucial point your development and all of that kind of gets derailed, it's a hard thing to deal with when you're still an emotionally immature teenager.