I was about to add in "they'll be saying this about sissy and trap next", but lets be honest they already do.
Any man calling himself 'femboy' is either a raging transmisogynist who defends himself by expressing his bigotry as an "UWU softboy its my birfdayyyy 🥺" or a closeted transfem who has been forced into this role by society because she believes it's the closest she can ever get to a 'not-man' status.
The term is a slur that can be reclaimed by transfems and transfems only. TME people can keep it out of their fucking mouths.
Look at any depiction of a "femboy". Literally any. They are just transfems, moreover they are everything society wants from transfems.
Almost exclusively skinny and white. When they aren't it's seen as an aspect to eroticize and alienate them further rather than just part of who they are.
They uphold the sex-gender binary without giving any cissies icky feelings. They make themselves sexually avaliable to anyone and everyone whilst simultaneously being completely innocent and unaware of what sex is (occasionally they will acknowledge it's existence, but in a "pathetic" or needy way, often begging for an of screen partner to 'do something' to them).
They embody the complete fantasy of "tranny you can do whatever you want to".
Maybe this is an overreaction but I genuinely think that the reason a lot of TME people who are otherwise fine with "femboys" now oppose the "futa" and "trap" is because transfeminists brought attention to what was otherwise a semi obscure fetish, it was known of of course but the details of it were only really known by the people who dehumaized and objectified transfems were into it and they were disgusted by the idea of a man submitting or being "tricked" by a tranny.
And they're fine with femboys because that sepcifically is the type which submits to other (almost exculsively men, exclusively white[unless the person in particular is pulling some BBC shit, kill kill kill], typically cis but not quite as certain as the others, and exclusively perisex. Oh of course able bodied too, always able bodied).
Anyway, if you're TME this is not a word for you. There're plenty of other terms but this one can only be reclaimed by transfems.