Things you don't like in novels?

Isekai is one but the mass murderer is another. Where the line is drawn between being an antihero and a flat out villain is hard to say. Even in Western publications, we have popular characters that are or might fall under "mass murderer" or "serial killer". Two that come to mind are Deadpool and James Bond. 

I hate it when authors add unnecessary love triangles and drama seemingly just in order to prolong the novel... it gives me a headache honestly  

The amount of times I had to forbid myself from continuing to comment on various power fantasy novels because I just ended up arguing with fanboys who absolutely love seeing cardboard antagonists is astounding. I blame it on the writers being shit at actually writing. 

I don’t like that in some novels the MC (or whoever) does/says something idiotic, disgusting, or enraging, but then no one acknowledges it ever again. They just all act like it never happened. 

In a way they do. It's pretty rare for diseases to cross between species, if I recall my immunology classes correctly. 

Yeah a good webtoon should be able to end aroung 100 but its so rare 

Miscommunication and misunderstandings caused by it-- so tired of reading these in romance novels but they're easier to take than the BS justifications of MCs for their acts that quite contradict their previous and future deeds and decisions, and just make them more of a hypocrite rather than the badass they are portrayed as. The last one is what I dislike the most. Selfish characters are far more interesting to read because you're able to see what really motivates them in their endeavors, even if these motivations do not align with your beliefs and morals. It's harder to do the same with characters who exhibit contradictory behaviors and just make you want to roll your eyes at them. Sadly though, I've gotten used to these (they're far too common not to) and my brain just automatically overlooks such situations.  

Can I ask what novel he left that review on purely so I can drop a like because that is one of the best reviews I've ever seen
Edit: Shiiiiiiiiit I just found out that it got deleted shit how can such quality be removed in the face of this world?