I am thinking because of two things:
- The team had all year under his leadership and suffered many critical losses the entire (2021) season outside of getting to Berlin. Even in Berlin they were never convincing victors. Even though I love 100T, you only can pull off incredible comebacks if you start off really far behind. Constantly being behind isn't good. Then they got read and anti-stratted real hard by Envy.
- Probably not always the best having someone at his level of "toxicity" or whatever you want to call it all the time if the team isn't built for it. How the team feels as a unit matters.
I am thinking it was a year or so of disappointing finishes and an unhealthy team dynamic that probably lead to it. The second point is a real stretch and just a guess based off of whispers and rumors.
But that is probably why :)