Relationships that are out of place. We know you two are the MCs and you're hot but...the world is ending, she's got powers she can't control, blah, blah, and now we're focusing on the girl he was talking to the other night, and some past lovers turning up... y'all are teenagers who can barely keep yourself alive...nobody got time for that.
Overpowered people. You're an MC you're powerful. Great. But you just found out yesterday and there's no way you can control it that well and be perfect and the best there is in the whole entire world.
Techy people having four PhDs, knowing how to weild a gun, and hack into some government site
The "I don't notice you until you had a "makeover" and completely changed who you really are, now I think you're cute, let's go out?"
Romanticizing and sensationalizing abuse/mental illnesses/suicide. From this there's also where a character goes through something major but is unscathed without an explanation? Doesn't happen in real life. And this is a huge no from me.
Love triangles that are not done right, which are most of them.
There's this thing that happens when they don't tell the police bc they think they got it under control and that these trained officials won't help them...and then everything goes down the drain.
Unnecessary drama that drives lovers apart. Especially the overuse of jealousy.
People giving up good jobs/scholarships/something no one in their right mind would turn down for something like a relationship or friendship, because they can't possibly think about talking it out and pursuing their goals.
The power of friendship and family..........it's strong but not that strong (it depends on how you use this one though I've seen good ones and bad ones)
The MC leaving someone/friend-zoning someone who truly cared for them for someone who treated them like crap, for no reason other than I saw them and I had a crush or they were my first love, not because that person had really changed or anything.
People (lots of time females) who are unrealistically docile/can't take care of themselves without a certain someone. In real life that person would have a serious dependency issue.