No. I wish people would stop repeating this marvel overload/fatigue idea - I'm not convinced it's a thing respectfully. The truth is, lately Disney has been pumping out a lot of mediocre content. A good story is a good story, period. This movie was not really good, and it required someone to have watched a bunch of other not-great Disney+ shows.

Marvel has sooo many good stories and content they can dig up from their comics, but ultimately the business side of picking the content and shaping it for maximum profitability is sort of where shit gets weird. One theory is little kids want to go to the movies and make the parent bring them, so the movies are produced (catered) with that goal in mind.

Rather than marvel/superhero fatigue, I think it's more of Disney dropping the ball (like they did with the star wars movies, inb4 they made billions, we all know the movies sucked).

Post infinity war, my opinion is This entire parallel worlds/timelines/dimensions storyline is a bit confusing on what exactly the endgame plan is