I grew up watching cartoons, and still do.
I'm an avid scifi, horror, and speculative fiction reader/watcher.
There absolutely should be animations geared toward adults.
I don't like Rick and Morty. I think it's dumb, self obsessed, drivel. I think it's writing style is the literary equivalent of pumpkin spice latte. No one hurt me, I just don't like it and I don't understand why people do. I answered a question. I didn't tell people to not watch it.