In "normal" life, an underperforming employee is released with no comment, or with a neutral "we have amicably decided to go separate ways" statement if the employee is a public figure. This approach preserves at least a veneer of graciousness for both sides, and allows the person in question to "save face." This is how everyone from a fired CEO to a laid-off factory worker is treated. It is rare for this course to be deviated from unless the individual was guilty of criminal conduct.
In ESports the team manager usually makes a public statement along the lines of "we loved x and really value him as an individual" but then goes on to imply that the person in question did a, b, and c bad things, and it is because of these failures, ie because of his own deficiencies, that he is being let go.
I really don't see how a departing player could possibly part amicably with a team that libels him while showing him the door. I also don't see how it benefits the team in question - generally no explanation is needed; people will figure it out. Saying anything beyond the minimally-required "so and so is no longer with us; we thank him for his service" seems juvenile.
TL;DR: ESports teams are unprofessional when letting people go. Agree or disagree?