A bad ending can absolutely restrospectively destroy the experience of an otherwise good story.

Don’t forget The Witcher 3, where bad end is on par with Mass Effect 3 and the logic to get it is really dumb and poorly telegraphed.

I still have CDPR (and by extension GOG) blacklisted. They burned me on that entire franchise and wasted a ton of my time. As far as I’m concerned, they owe me a game yhat doesn’t suck.