Oh, I can absolutely put it on the filmmakers when you still haven’t gotten to Galactus or Dr. Doom as major big bads. It’s lazy and desperate to go back to the well, IMO. Have the comics gone back to Thanos before? Sure but that doesn’t mean that has to be set in stone (no pun intended) for the next move in the MCU.
It’s not like they haven’t veered far from the comics as well. Just because something has happened in the comics doesn’t mean they are forced to follow. I mean, they’re proving that if they dump Kang mid-arc at the moment.