Incorrect on both points.
After Sylvanas betrayed the Horde a majority of Dark Rangers stayed behind with the Horde while a small percentage remained loyal to Sylvanas. When talking to Dark Ranger Velonara at the Orgrimmar Embassy after witnessing the Horde Council form you get this dialogue option.
Greetings, .
These are interesting times.
Player: "I see you remained in Orgrimmar."
Dark Ranger Velonara: "We dark rangers were fiercely loyal to Sylvanas. We trusted her… followed her commands.
It is clear that our loyalty was never truly reciprocated.
Some of my sisters and brothers have chosen to remain at the Dark Lady’s side. I, and many others, have not.
<Velonara’s expression becomes steely. Determined.>
I refuse to be a slave to this torment.
Both the sin’dorei and Forsaken are my kin. I stand with them, and with the Horde."
Taken directly from Dark Ranger Velonara’s gamepedia page.
~https://www.wowhead.com/npc=152539/dark-ranger-thandel#sounds
Look up Dark Ranger Thandel. He’s a male and there are also male Kal’dorei Dark Rangers as well. I’m not sure if you are feigning ignorance, trolling, or genuinely did not know.