I have to say that on the occasions I've seen where trans and nonbinary people share their opinions on a relevant thread, the reception hasn't been overtly transphobic- to avoid the moderation, I feel- but it's certainly been frosty. It usually descends into derailing as people ask personal questions to the trans poster instead of replying to their relevant points or responding to the OP.
So, it's not explicitly transphobic, as a whole. But I also wouldn't advise a trans person to openly post on here, as others have said.