Too many isekai titles: While there are a number that I enjoy, there are just too many and increasingly the way they try to differentiate themselves just feel like tacked on gimmicks. Even the ones that try to parody the genre feel generic sometimes.
Too many OP MCs: Sorry, but when the MC can take out a major boss or an entire army without even trying, it gets old real fast.
Rificulously long awkward sounding titles: not just talking about the english translation either. Increasingly some sort of abbreviation or nickname is almost a necessity.
Movies replacing follow up seasons: this may not be a trend yet, but it feels like it could become one with examples like Demon Slayer, Made in Abyss, Konosuba and Kabaneri of the Iron Fortress. I’m not talking about stand alone stories like with older series, but where the main storyline is advanced. The shorter run time usually doesn’t allow for enough character and story development and side characters often get no attention at all. Movies allow for more impressive visuals, unfortunately it usually culminates in some CGI monstrosity for the final showdown (looking at you My Hero Academia & Konosuba).
Welp, think I’ve vented enough of my curmudgeness.