My religion is kindness.
I agree that no matter what happened, you would always be able to find at least a few lone cranks who were dissatisfied; however it is very much not true that you would always find that a huge fraction of the fanbase was dissatisfied, a million people would be signing tongue in cheek petitions against the writing, and general consensus stabilizing around the conclusion being a flub.This is one of the things I've realized. No matter what ending we got, not only were there people who were going to be dissatisfied, there were going to people that claimed the ending didn't follow from came before, violated established characterization, came out of nowhere, or, basically, any critique you see directed at this season. That doesn't mean the critiques are all equally valid, but it does mean from a distance they'd pretty much look the same.
Heck, we saw in almost the same month a different crazy ambitious finale to a decade long, cultural phenomenon media property in Avengers Endgame, and that very clearly has had an incredibly different, successful, reception.
The media critiques issued by a lone crank, vs. a thoughtful critic, may look the same from a distance, as you suggest.... but once observed up close, it's not hard to tell which is which.