I am curious what ultras you are specifically talking about.
I agree with the other commentors regarding the nature of ultraleftism, but I am a bit confused. Is "Ultras" being used in a different manner here?
When I was considering myself a "Maoist", the circles I was active in were often very LGBT+ inclusive (to a fault, at times - by this I mean taking ultraleftist lines on the LGBT+ question of liberation a la plastering arcane propaganda on building walls like "Death to Truscum", a term mostly only known by the chronically online). Same with anarchists. Which ultras in particular are this LGBTphobic? I'm not trying to defend ultras here, but I have interacted with just as many, if not more, bigoted "Marxist-Leninists" as ultras.