just because you don't like a trans person, for whatever reason, does NOT mean that the way you should be aggro towards them is by misgendering/deadnaming them, purposefully doubting their identity, or otherwise being transphobic towards them. that just undermines the rights and efforts of others, too, for no reason.
if you dislike someone, that's fine, dislike them, but don't show that in a way that would cause needless harm to others who did nothing wrong.