Lemmy does have a serious misogynist problem. It's a male dominated space with a lot of users from other, already misogynistic places, which creates a heavy concentration of it.
A lot of the misogyny isn't acted upon, either, because mods and admins here sometimes share the same views. It's no wonder women don't feel comfortable here. The few that do stay, such as Velma, have to constantly battle misogyny. It's fucking gross.