I'd like to make a list of all the template events we see in Isekai novels, such as the three thugs harassing a girl in an ally, the adventures guild heckling the newby, the rich girl in a carridge getting attacked by bandits, and so on. Please give me anything that comes to mind, thanks.
Getting kicked out of the party for no reason Marriage annulment for Noble Villainess Evil Shoujo genre isekai
Girl falls from the sky. MC's sold high tech smoothly and get rich from it, instead of geeting mobbed/killed after selling it. Truck sama MC raising a girl to marry her later.
being abused by an abusive tsundere for something that's not his fault EDIT: also whatever premise they have getting turned into SoL Harem sooner or later
foodies - missing soy sauce or miso typical beta highschooler or salaryman doesn't abide by the new worlds common sense (takes things for granted)
Because you're asking for cliches and cliches are mostly disliked by reader. Ex: Confessing over romantic fireworks. "Eh? Nandatte?"
Betrayal angsty emo teen? Nobles being prickish (a common trope regardless) If male/ female MC, the opposite sex will flock and same sex will antagonise with no reasons whatsoever (another common trope.)
dense mc with at least a 3 or more people harem edit 1: unluckiest man in the world (all drops are bad, even if the good drops have a 99% chance of happening) the betrayal by trusted one (cough cough, dungeon seeker) edit 2: protagonist has a presence of 0 in his party/team edit 3 (just because): that one girl that falls in love right after meeting, even though she most likely wouldn't have but does anyway
That goes without saying, you asked for people to list the things that ticks them off the most... The problem with tropes is not the tropes themselves, you can have a novel with nothing but tropes and still be interesting. What ticks people off is when authors take these tropes and stick them into their novels without thinking about if it actually makes sense in the first place. The best example I like to give is the ancient tomb that opens every 1000 years opens every Tuesday. (Not JP, but it is really the best way to express the example) Effectively, 1 novel came up with the idea of an ancient tomb having loot and powerups. Authors like the idea and stuck them in their novels and it became a trope. Then at some point, the concept of 1000 years tomb escaped authors and they simply kept sticking the trope in without thinking. Now, many stories have these once every 1000 year tombs opening up almost every other arc within the same year. At this point, the trope has lost its original meaning and has become simply an overused ridiculous element. The same applies to modern JP novels where many tropes have lost their original meaning and are just put into novels regardless of if they actually make sense. That is what frustrates people.