I'm an MCU fan. And while I do agree quality has gone down, I think it's hard to ignore the fact that the MCU did something really novel. They made a franchise that spanned 20+ movies and tied it up in a way that was almost universally loved by nerds and normies alike.

Are there a lot of plot holes and retcons? Yeah. And some bad writing. And the movies that came after have been pretty meh with some exceptions.

But for someone to say that referring to one of the highest grossing films and franchises of all time, means their decisions should be questioned, is quite the stretch.