It is interesting. Maybe they are worried they will create more TERFs if they go after the straight women?

HSTS FtM tend to be more reserved than their MtF counterparts (female socialization intensifies), which means they on average do not throw hissy fits when they get rejected by straight women.

Also, like a portion of self-aware MtFs, they know straight people have no interest in them, so they simply go for a bissexual/lesbian woman instead.

Another thing: notice how FtMs and MtFs who whine about sexual rejection tend to frequent TRA circles in masse. This in part explains their behaviour, as such places embolden them to act in such a way, providing them a comunity of idiots to will assert their stupidity.