That's not quite true. You can hate men, but not males.
Because, you see, "some males are women" and you're not allowed to criticize women, not even women who have dicks.
r/gendercritical was banned for criticizing transwomen. There was also a sub with a name something like "its a fetish" (the claim being that transwomen are men with a fetish for being women) - that was banned too.
Reddit honestly believes that gender is a social construct. As a result, the root password to their ideology is to just claim to be a woman.
I bet you could get away with a subreddit like transWomenCels if you explained in the sidebar that the subreddit was specifically for transwomen lesbian virgins, and that you use the term "foid" to refer to cis-women, and "chad" to refer to cis-men. I bet that every post and comment from the old incels subreddit would be perfectly acceptable then.
You could say, "god a hate foids!!" and the reddit admins would think, "this is acceptable and understandable rage from a marginalized community directed towards the oppressor class" - I bet they'd even ban any subreddit that criticized you, calling such criticism "harassment"