I think this person is either a troll or doesn't understand the nature of these situations because Leni is, in her own words "a non-transgender woman" and also is not being slandered but has actually engaged in bad faith interactions like Nazi apologia, and literal transphobia herself.

Dragonfucker is a weird and uncomfortable situation because people were and still are misgendering them (including ironically OOP) but dragonfucker was not ejected from many Lemmy instances and communities because of their pronouns but because of misgendering, sealioning, and literal harassment of users of users.

Looking at it more I really don't think this person is acting in good faith at all, since they chose the worst people to represent in their arguments. I absolutely do think that Lemmy, especially on bigger instances or ones with more agnostic moderation, have problems with transphobia and bigotry as a whole (especially of the thinly veiled variety). But I would never suggest that two of the most prolific trolls on this platform are innocent victims.