I'm on board with firing AA so clearly Gibbons is not the only problem with this team or even the biggest one. However, that doesn't mean the Jays should be satisfied with him as manager when he doesn't get results and routinely makes game altering mistakes.
If people like Gibbons, that's fine. I liked Cito even though he made mistakes, so bias will exist, but some are suggesting that Gibbons is "the best manager in franchise history", and things like that. It's not based on reality. Even ignoring win/loss record, his managing style is entirely replaceable and talent rarely take steps forward due to anything he does. If that's the case, why keep going back to him?
Managers don't matter as much as talent, but bad managers can hurt a team. If Gibbons were average, then I'd still want him replaced, but he wouldn't be as bad as he is now.