Probably a reference to this band which was big in the 60s and also obviously they were called The Fantastic Four! https://en.wikipedia.org/wiki/The_Fantastic_Four_(band)
If anything, the reactions remind me of GoTG Vol.2 reviews. There were lot of complaints that Gunn shouldn't have been given that much of freedom. People who loved it, LOVED it. The fanbase was divisive upon release, but years later now it's looked back on as one of the better MCU movies.
Bang Bang was good for its time but War lost me at some of the stupidly overlong action sequences. If anything, Ek Tha Tiger from a decade ago had much better action than it.
This franchise is Vinnie D's baby, it doesn't matter who's directing. Honestly with Lin returning I expected F9 to be good but it was worse than F8 at times.