I would compare it most closely to this.
Unless you're talking about the Megamind style "supervillain with elaborate scheme is captured, jailed and then escapes rinse and repeat", superhero fiction isn't a genre. For example, no-one's going to call Sherlock Hound a superhero story even though it almost follows this structure to a T (Moriarty always escapes). But more importantly, no-one would say that the MCU doesn't have superheroes even though hardly any of the movies work like this (arguably, none do). Rather superhero fiction is a setting where superpowers exist... and any genre of story is capable of existing within that setting.
EEAAO is an absurd film, quite deliberately so, but the basic structure is the same as Ant Man. A character is introduced to a fantastic world by someone who hopes that they're capable of solving a problem that can only exist within that fantastic world. What specifically happens is very different but that's the basic core of the film as you start watching it. It's won the Best Picture Oscar probably because the character story doesn't require the fantastic elements... it's a subject which is seen as Serious Cinema, i.e. the family drama.
Compare also: Hook, Turning Red and Encanto.