What I personally find frustrating is that many people approach from the perspective of there being this like platonic form of roleplaying, a golden structure of play, even if just a golden structure for them. And they basically have no respect for play that does not meet their standard or really any concern for accuracy when discussing other methods of play. The only concern seems to be is this for me and/or does this conform to my golden standard.
Like how narrative game has come to mean anything besides play is not structured fundamentally like AD&D. Games have basically nothing in common except not being structured according to the golden standard get treated like they are fundamentally the same thing. Crucial details about how they work, how they are structured, what their mechanics do get confused and attempts to clarify get met with I still don't like that as if whether you like or not is the only thing that matters. Not the actual details of how stuff works or the communication costs that combining these very distinct things together as one have on people who play these games.
Treating fundamental differences between games like Hillfolk, Chronicles of Darkness and Apocalypse World as essentially rounding errors is deeply frustrating because they play nothing like one another and have GM roles as distinctive from one another as they are from AD&D. This is especially frustrating for me when it comes to stuff like Vampire - The Requiem which at core is pretty damn simulation-oriented but gets cast as Narrative because the things it simulates are as psychological as physical.