Sony marketed Morbius as a "Sony-verse" movie that was connected to the Spider-Man MCU movies, which was nearly false advertising. The post credits scenes had Vulture plucked from the alternate universe where MCU shit takes place and name drop Spider-Man in an awkward "team up" moment with Morbs. Before that, it's just a typical 2000's era comic book movie. Part of why this movie is chosen to be memed, and not other Marvel movies, is that audiences knew it was going to be underwhelming. Leto's reputation is in the toilet after his failure to play the Joker effectively, so he needed to fire on all cylinders as Morbius which he clearly did not. That's a big reason why it's so funny to make jokes about enjoying Morbius: the idea that someone not only liked the movie, but loved it, is absurd.