if you think that there aren’t huge portions of the trans population who have no support system

Huge portions of the trans population having no support system doesn't imply that reasons for detransitioning will include not having a support system because the lack of a support system alters the likelihood of transitioning in the first place.

if you think that there aren’t huge portions of the trans population who have no support system, it doesn’t really feel possible to have a meaningful discussion about this with you

I don't think that and it doesn't make sense to assume or even suspect I do, given anything I've said. I've no idea why you've introduced this idea into the conversation.

And even if I were to think that, what you've said doesn't invalidate what I said, which was that having seen /r/detrans, the reasons given seemed silly.

Clearly it is indeed not possible for us to have a meaningful discussion.