I don’t think the person on the left’s a transphobe, but I also don’t think they understand the scale of the harassment trans people face on a daily basis. Like it’s so bad the users would rather just have potential trolls ignored and downvoted than to see well meaning cis people come in and do vigilante justice using the same tactics of abuse trans people go through every day.
That empathetic disconnect looks like transphobia to some users. I don’t know that the users are right, but I understand how you reached that conclusion, especially with the person on the left’s days-long soapbox crashout about how despotic Ada is.
I feel like that could be casting too wide a net, though. Gender isn't an on or off, it's a series of gradients with no clear dividers.
For instance, what is considered gender nonconforming? Is it failing to meet the platonic gendered archetype of one's biological sex? I'd be willing to bet more people fall into that camp than not, especially among the cis-queer community.