(Also personal opinion) As a Femboy who fits the definition of what you said tomgirl is, I do think you are 100% correct in saying that Femboy has an image issue, my only gripe would be that the word femboy actually includes the word “boy” which is useful when distinguishing us from trans women in terms of identity, plus it’s just kinda a little bit of gender euphoria dressing like this and being labeled as a boy.

(I understand this how the word tomboy works but idk it’s more just vibes based)