[origin_path]

"I thought trans people being oppressed was clear statistically and unambiguous."

Oppression isn't something you can even give a clear and unambiguous definition for, let alone measure statistically.

"my understanding is that they are a group with massively higher rates of suicide and depression"

This does not automatically imply they are oppressed. An obvious and common alternative interpretation is that choosing to surgically change your gender is at least sometimes caused by mental illness, which also causes depression and suicide, and/or that people who change gender discover that they don't actually like their new gender (for internal reasons, not due to the attitudes of others).

[antifa]

Even if we follow your chain of logic uncritically, then we still arrive at the same conclusion because mentally ill people are oppressed.