I don't deny that, but just because the peak hit with the MCU, doesn't mean it's over for non DC or Marvel properties. THE MCU's main problems that Disney is destroying the stuff out in the assembly line and expecting to hit that same high a thousand times without much care or effort put into it. Sometimes they get a hit, most of time it's a miss. The exact same problem they're doing with Star Wars.
Ah yes, but I don't think anyone goes "it's over" in the absolute sense of no superhero move or series or comics ever appearing ever again. What "is over" is, probably, that huge dominating wave of superhero movies from the last few years. There will always be the occasional one, the MCU will keep making some in (very) relative indifference, and there will be a re-invention, or a reset, and new waves. Actually, I don't even think superhero movies will go back to the pre-MCU calm.
Look, I don't like all superhero things either, and I'm more than willing to try something different, but there's nothing wrong with liking or disliking what yours. With that said, superheroes can always bring positivity in good things, when done right and treat it with proper care and respect. They ain't afraid to get into the dirty details or teach an important life lesson when and especially needed.
Yes, and superhero comics are always interesting to study (I'm always interested in reading wiki summaries or even books about superhero comics), because they form a mythology that reflects society concerns, trends, etc. It's just a style that I cannot appropriate, because too many things in its grammar displeases me, from the superpower itself (the opposite of my favorite comics heroism based on mere will, ingenuiity and good heart), to the boringly hysterical physical violence (people don't stop punching each others for more than half a page, even during expository dialogues), to the stylistic structures (dialogue textwalls during instant actions) and designs (this leni riefenstahl fascination for athletes in
body paint spandex). There's some good stories in the occasional graphic novel (most Alan Moore, Azzarello's Joker, etc), some cool gameplay in some games (the Arkham and Telltale are great), and enjoyable movies (the casting and characterizations in the MCU were awesome). But generally, it's not a grammar I'm primed to like.
Same with the anime/manga style. By default I don't like it. But I won't deny the greatness of Miyazaki's classics, Cowboy Bebop, Jin Roh, Death Note, etc. It's just that for me they have to be awesome enough to overcome that slight handicap, instead of riding a quality as in the eyes of manga/anime fans.