What are some plot armor/MC serving tropes that you dislike?

What are some specific plot armour tropes or just tropes or scenarios that exist to benefit the main character that you don't like? Personally I don't like tropes where the main character(and this is for any gender of MC) from the original story was killed, had their opportunity stolen away from them, died suddenly, or was never born(like imagine if your success depends on if they were never born at all, skill issue much?). Because honestly in a lot of stories it just feels like if the original main character was still there or had thier plot benefits, then the MC would never succeed. Only things like ORV, and some others pull off not getting rid of the original main character or stealing their powers etc. Also I dislike 'Stole her man' tropes, now I know this is usually done with in reverse harems, but sometimes when it's done in a situation where(from what the story itself tells us) the og MC had a specific love interest, and even though they had suitors, they maintain respectful boundaries with the others and only had an intimate connection with that one love interest. Why you trying to take their man? Really?