Oh and then there's that one ally in the group that's mean to the new recruits and it turns out he's a traitor.
Or the ONE guest star on the TV show that is a semi-recognizable actor... he/she's the bad guy, every time.
If it helps: One of my main characters is a rape survivor who turned to serial murder as a form of therapy for her PTSD: acts of absolute power to recover from the feelings of powerlessness. She makes it clear that this is a sign of how unusually violent she is as a person: the vast majority of survivors would've been even more traumatized by murdering innocent people, so she's clearly different from them for murder to have comforted her instead. She also makes it very clear that group sessions and anti-anxiety medication worked even better than serial murder. I'm not a fan of the "No Therapy" paradigm, and I wish that more fiction would try to show that mental health is not fundamentally different from physical health.
So, all it boils down to is sh*tty psychology, the unresistable urge to describe the MC as ballistic/superlative/invincible and overuse of clichés. I daresay if there was one to two clichés in a book, carefully spaced out and used at opportune and right moments and one to two real good powers of the hero, followed by commonplace to mundane chars of him/her, we would eat all of it more happily.
We are a team/family of supernatural experts/hunters who live in a warehouse/mansion full of various weirdlies where weirdness happens all the time. Someone in the team is acting out of character all of a sudden. We don't logically assume a supernatural reason for it. We just get mad/offended at their inexplicable change in behaviour. We are also SHOCKED when we find out the cause is supernatural.
A character turning on the TV and the reporter announcing "Breaking news! ..." Seriously, how is the reporter not already in the middle of the sentence when the TV just happens to turn on?