The worst of Star Wars is pretty bad, but I’ll agree that 90% of the superhero genre is absolute trash. But there are some real gems out there, as well as some highly enjoyable, entertaining films.
For me, Rogue One and especially Andor is absolute peak Star Wars, and I would likely put Andor above anything ever produced in the Superhero genre. That said, the following content is all somewhere between very good and very entertaining (in no particular order):
The Dark Knight
The Suicide Squad
Peacemaker
The Penguin
The Boys
Invincible
V for Vendetta
Thor: Ragnarok
Avengers: Infinity War
Deadpool
Deadpool 2
Deadpool & Wolverine
X-Men: First Class
X-Men: Days of Future Past
Watchmen (series)
Guardians of the Galaxy
Logan
Captain America: Winter Soldier
The Incredibles
Megamind
There are several others that fall into the category of quite good and entertaining, and I’m sure there will be some debate as to movies I’ve included and ones I’ve left out. But my point is more that there are actually quite a lot of very good superhero movies, but due to the sheer volume of output, even though I’ve listed 20 films, it still only represents a small fraction of the overall universe sizes. For every film I’ve listed, there are probably 5 or 6 that are somewhere on the spectrum between okay, and utter trash.