>>149930922 (OP)
A LOT of things went wrong, but overall, yes.
>Brave New World flopped
>Thunderbolts* flopped
>Fantastic Four is underperforming
>Superman despite seemingly outdoing these at the box office STILL underperformed so hard it was just shunted onto streaming this week
MCU Phases 4 & 5 were incoherent shitshows, sure, Jonathan Majors' legal issues obviously massively derailed the former but let's not kid ourselves--Ant-Man and the Wasp: Quantumania? Multiverse of Madness? Black Widow (several years and Phases too late)
The quality control is non-existent, Louis D'Esposito isn't a comic guy and the names of popular story writers are just to placate fans they don't believe they need a consistent theme or throughline, he and Kevin Feige just think they need to be 'fun' to work.
Bob Iger also fucked them over with the Disney+ sloptent farm in having so many shows (and infamously Black Widow dropping on the streaming service while still in theaters to sabotage it and fuck Scarlet Johanson out of royalties as exposed in their lawsuit) that created a lot of homework like Multiverse Incursions that were only introduced proper in that shitty Loki series.
Kang was a fucking joke in Quantumania and was taken out far too easily to be seen as a valid threat and seemed more like an annoyance with his alternate timeline variants as opposed to the looming ominous threat that Thanos was built up to be from Phases 1-3.
Pedro Pascal fatigue also hurt First Steps on top of controversies regarding him being seen as a creep in the post #MeToo era as well as the weirdly desperate and cringy push to call him a "daddy" on top of looking and acting nothing like Reed Richards to the point he refused to shave his mustache (at least Henry Cavill had a valid reason due to contractual obligations with another film in Josstice League)
The Fantastic Four only ever really received mainstream success on the silver screen in the Tim Story film duology.