I've seen a TON of hatred on boards for Endwalker; in particular, mentioning Venat, Dynamis, hell ANY part of Endwalker's story in any sort of positive way is enough to make the entire forums collectively lose their shit from what I've seen. Relatedly, indicating that the Ascian's plans to kill off millions of people to get their "perfect world" back is even slightest bit messed up, or even admitting that Shadowbringers isn't your favorite expansion for whatever reason, will make the autists start screaming.
Also, I still see hatred for Lolorito and the Syndicate sometimes.