The complaining between the 2 faction playerbase wont stop and a lot of it is because of ignorant alliance players were early on.
All throughout Vanilla, TBC and WotLK, I didn't see much of complaining about either faction, besides some stuff over wrathgate, but one of the earliest I saw was in Cata by Alliance players.
Blizzard finally acknowledged that Horde players had less zones, shittier cities and so on and with the revamp they decided to balance out the zones... however Alliance players cried bias.
After WotLK an expansion that was heavily Alliance focused, we finally got one with Thrall in the spotlight and Alliance players cried that Chris Metzen's Pet/SelfInsert was Horde Bias.
I grew up with a spoiled entitled sister who now complains about the lack of spoiling she gets(she doesn't phrase it like that)which it feels eerily familiar on here. When the Alliance players on here stop acting like spoiled entitled brats, there probably wont be much complaining but normal discussions.
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And now the Night Elves are refugees... and it's on him, entirely