How so?
I don't really follow Brazilian politics, but Jair Bolsonaro was found guilty by the Brazilian Supreme Court of:
participation in an armed criminal organization, attempted violent abolition of the democratic rule of law, attempted coup d'état, qualified damage, and deterioration of protected heritage property.[1]
Flávio Bolsonaro is Jair Bolsonaro's son. "attempted coup d'état" is a failed coup.
There don't seem to be any serious questions that the process was fair and that the Supreme Court was impartial (I mean there are always Trumpian accusations of bias, but I mean ones with any evidence at all).
The only part I could see possible disagreement with is organizer I suppose? But I must be missing something.
[1] https://en.wikipedia.org/wiki/Trial_for_the_2022%E2%80%93202...