Even if they were making competent products, the sheer amount of them they've pumped out in those years would be hell to keep up with. They've got movies, shows, comics, novels, all of which involving the main characters and building off each other.

The MCU was literally just movies for most people and that's why it was able to succeed. The first batch of TV shows was mostly irrelvant extras (like the EU was for old Star Wars) and it started to die once the TV shows became necessary post-Thanos.

Its no wonder that even people who aren't culture war aware couldn't keep up, both motivationally and money wise.