Oh yes, I don't like comics as much as I like manga. I still read a few about Batman (e.g., Hush, The Long Halloween), but mostly because I really like Batman a lot. The media itself is meh, every page is too cluttered, reading is quite complicated, and the fact that both DC & Marvel had a ton of reboots and both went with multiverse concepts, it does indeed feel like there is only fanfiction over fanfiction.
On the bright side, everything is canon. You want Batman marry Catwoman? There's a universe for that. You want Aquaman to be relevant? I'm sure there's a planet Earth something-something that is fully covered by water and Aquaman is the mightiest hero there. You want no mutants? Well, MCU has been that until they acquired the rights, ahahhaha.
Both manga and comic industries have their own shortcomings, but at least manga is more of "story starts, story finished".