I watch a lot of anime and read a lot of mangas. While I still have respect for the characters from comic books, such as Batman. I just got really tired of constant events, constant wiping of continuity, puesdo character evolution, or general lack direction for a series. I don't even really blame the writers or artists (other than Greg Land). I blame editors who want to keep characters in a static level. A character my get a chance to evolve under one writer, but another one will come along and change it. Joe Quesada wiped out decades of character history of Spider-man all because he didn't want Peter and Mary Jane to be married. He even wanted to bring back Gwen Stacy, but faced push back from the other writers and artists. Nothing about that character's history means anything to him. Comic publishers are obsessed with retelling the past instead of moving ahead to the future.
With manga, I'm pretty much guaranteed continuity, character evolution, and no wild jumps in art style. The drama feels real and deaths aren't motivated by sales. Marvel is now planning on killing off a character every quarter. That's blatant pandering. Why would they even admit that to the public? Death and continuity in comics is an absolute joke. Mangas are planned out for the long run. While comics are only planned for the few months a writer is on the book. Something could happen in a manga and leave you wondering about what this could mean for the future. You will almost always get an answer to the questions. With comics, something may happen but never get resolved. That's because a new writer comes along and doesn't think about this. It makes me wonder why the first writer even left you hanging.
After Cassandra Cain left being Batgirl. I was really looking forward to that moment of their reunion. She was basically his adopted daughter at that point. Well, DC did all those Road Home books. Everyone got a Road Home book other than Cassandra. The even more weird thing is that the Road Home books were being released before the outcome of Return of Batman. They were telling the story of his return before he even actually returned.
Even now, DC is basically trying to turn Superman into Batman. They are trying to turn him into a brooding loner.
It also helps that not every manga or anime is designed to go on for several decades. Some anime series can be as short as 12-24 episodes. I like a lot of animes, but I also prefer to read something.