When I saw this teaser, I assumed it was for the previous season

Ditto, how is this new?

I don't know what actual 'hate' he is receiving

None of them get any actual hate. The awful transphobic hate they refer to is anyone questioning the sanity of what they're doing.

I was on a Discord chat with stupid fucking youngins, cause that's apparently the only people who use Discord, and one of them says she's a transman. A moment later volunteers she's a sex repulsed virgin. I really wanted to suggest that just maybe she's not really a guy so much as she's afraid of being penetrated by some hairy, smelly dude and this identity protects her from that fear. Saying entirely reasonable things like that is hate.