Despite the similarities between the two series, everyone is gushing over Arcane and nobody is talking about RWBY anymore.
It probably isn’t any Anti-LGBT Hate. It may not be solely motivated by frustration with or antagonism towards CRWBY. It may not have anything to do with being an Indie Web Series. It may not just be people jumping on a bandwagon of hate. The reason could be far simpler than that.
From RWBY, to Blood of Zeus, to Cannon Busters, to so much more. Westerners pilfering of Japan’s superior artform won’t breed success.