I am trying to write a story and avoiding the first two things because I myself detest if the story has a plot that literally goes nowhere, even when I am reading to kill time.
Then there is the issue of unlikeable MCs, for me it is someone too pathetic, even for me, if I must say what kind of character that constitutes to pathetic, it will definitely be MCs with a heavy "no killing" policy even when the opposition is FUCKING TRYING TO KILL THEIR LOVED ONES. Of course the people can argue with TRY, but knowing the person has mens rea means you need to do something more severe instead of handing them to the law and hope they stay stuck there (they never do).
The third would be sexual content I guess? Especially SH is 50% made for sex, this feels weird to put out, because I can read stroke stories elsewhere, but after nut clarity, the stuff becomes like spam ads that clustered the storyline.