I get what you mean. It does get tiring really fast. I encountered some of that when I was trying out Guild Wars 2 in its first month.It always kinda shocks me how much people who play other MMOs seem to hate World of Warcraft.
Like I'm currently playing Final Fantasy XIV, pretty good game, some quirks and pretty limited content but still the only WoW-like I've been able to get into. Anyway, like 50% of the time I bring up WoW to make a quick reference to explanation since things either spurred from WoW (and WoW has a high quality of life/polish that I appreciate) in that game...or any other MMO... someone gets furious.
Like I'm having a discussion with some people in XIV about the accuracy cap and in XIV there's no gem system (there's a take on it called Materia but its highly limited and only on crafted gear and quest gear, no real end game loot) and no reforging, talents system to pull out from, etc, so I express my lament about struggling with the cap and my desire for more systems to toy with it.
So, instantly I get a: "What is reforging? Please don't let it be a WoW term..." followed by a bunch of other nonsense and it's just like...you're playing a fucking completely shameless WoW clone, get over yourself. I just don't understand the rivalry people feel with these games. Maybe I'm just gettin' too up there in years to care.
I think it's partly just a product of WoW being the biggest MMO still. People love taking potshots at whatever is the most popular. Especially if its been around a while. Like CoD comments in any big FPS topic or condescending snark towards Grand Theft Auto in any open-world game topic.
(CoD might deserve it at this point, I hear Ghost is not that great, but it's been going for a long time)