I'm not sure that I understand the rogue parallel, but maybe.
To elaborate: literally the entire campaign was based around the idea that anybody could possibly be the villain. Not in a paranoia way; more in the vein of "your healing potion doesn't work because the shopkeeper was actually the BBEG and he gave you fakes." Then later, when we actually fought the villain, we didn't actually because that was a different changling used as a decoy by the BBEG. It was pretty much that, over and over again. Seemingly, there was no way for the players to ever actually succeed at something.
That was back during 3.5. Their shape-shifting ability also allowed being small, medium, or large. In theory, it was possible to roll a skill check to see through the disguise, but the chances to succeed were low. Even if one of the players did miraculously succeed: you know it's a changeling but you don't know if it's the right one.
I wish I could say that I was making this up. But, I'm not. It's one of the only times I hoped for a TPK so the campaign could end.
On the player end... there's not a way to elaborate on that without saying things that may be triggering for somebody reading it. The nicest way I can put it is that I didn't enjoy being at a table to help facilitate someone's mental masterbation to their fantasy of being able to trick people into non-consensual intimacy.
On Marvel: I somewhat agree with your multiverse comments. On one hand, it's cool too see variant takes on characters. However, it's now getting to the point where it's difficult to buy into the stakes of a conflict in the MCU.
It's kinda like Star Trek time-travel being used to reset a series or rewrite lore. Once or twice, it's cool and possibly even clever. When it is overdone, it hurts the audience's (or maybe just my) ability to emotionally buy into the stakes of a conflict.