the word to describe oppression and bigotry toward trans men and other transmasculine people is anti-transmasculinity. both transmisandry and transandrophobia while popular terms misconstrue the nature of the oppression and/or are used by people who are transmisogynists. that is a large part of the kneejerk negative reaction toward those to terms.
also i think that people don’t understand how problematic it is to suggest that bigotry toward trans men/mascs js “just transphobia” and bigotry toward trans women/femmes is “transmisogyny” because it inadvertently suggests that the “default” subject is a trans man/mascs. there is transphobia that targets all trans people *and* there is transphobia that is particularized by target demographic. that’s pretty basic analysis.
I think transandrophobia is fine tbh. I've looked into the language around this & far more people claim that the ppl who use it are bigots than I've seen... actual bigots, by a huge margin. Etymologically "androphobia" was never a thing so it's easier to remember to split it into transandro-phobia. I definitely don’t like transmisandry though bc that is legitimizing the idea of systemic misandry