This is kind of an insane article considering that in 2022 Marvel films had the two biggest openings of the year, both bigger then Barbie in 2023. I think several things are at work here in addition to Ant-Man’s poor performance:
1) Secret Invasion was genuinely awful. Despite producing some gems, Marvel hasn’t gotten their TV production line down.
2) Commentators and industry folks have been predicting the MCU would imminently crash and burn for 15 years. It’s defied every supposed rule of franchise filmmaking and refused to do so, which has annoyed a lot of pundits a bit, especially ones inclined to auteurism.
3) The utter stink of DC is rubbing off on perceptions of all superhero cinema. We’ll see if that passes after Blue Beetle crashes.
Some further thoughts:
1) Although they’ve been wrong for years, it may be time to grant a bit of credibility to the auteurists and bring in some filmmakers with distinctive visions and let them express those, at least visually. Marvel’s been doing this a bit with Raimi and Zhao, though the latter was such an unmitigated disaster it makes the solution a harder sell.
2) It would be wise to cut back on the world building unless it benefits the immediate story, though the author is stretching for examples - Ms Marvel and Thor didn’t particularly suffer from it.
The next five Marvel films will give us a clearer idea of what’s happening. In particular, The Marvels, Thunderbolts, and the troubled Blade will test the selling power of the MCU brand. Deadpool 3 will be a hit regardless. After that the road becomes smoother as they return to Avengers territory, likely with RDJ and others returning, and move into the X-Men. Time will tell.