The example I'm thinking of is Bethesda and Starfield. Other than the graphics it's not a well designed game, but people keep making excuses for it, when smaller teams have done far more with far less money. The fans suggest the mediocre combat is intentional so you focus more on the role playing.
Nintendo fanboys are some of the guiltiest perpetrators. They don't usually accuse the critics of playing the game wrong (which is a different thing than what I'm talking about) but rather they keep speculating that Nintendo knows what they're doing and every bad mechanic is deliberate.
Perhaps Rick & Morty is a better example. For the past few years they haven't had a good track record. When a new season comes out, fans regularly speculate the reason for the mediocre episodes is they're part of a greater arc that we'll understand later. That it will be great on a rewatch.
I guess even stuff like Trump and the stolen election narrative is applicable here. Trump fans keep telling each other to "trust the plan" and that "Trump is playing 4D chess" even though history proved he was just making mistakes.
Is there a word or phrase for this phenomenon? If not, how about "overspeculating"?