I wouldn't even blame superhero burnout because stuff like Invincible and The Boys are really, really good. A good chunk of all the DC animated stuff is great too, and consistently released throughout the year.
Marvel on the other hand is just a factory now, and we're all bored with the same product over and over again. Massive CGI setpieces with a story built around the action because it takes longer to animate than to write. Action used to facilitate a part of storytelling and now it's just a big, yet incredibly important clusterfuck.
I kind of guessed when they started getting overly cosmic that shit was going to go sideways. The cosmic stuff is just insane in scope and scale.