To my knowledge Trevor pretty much debunked all those abuse rumours and chocked it up to “no, the girl was actually insane, look at these screenshots”I don't know who she dated before Austin, but she dated Garette from Mega64 for a while in a long distance relationship where she totally didn't cheat on him . Some point after that was Aaron from their live action content and I do not remember if there was someone between those two or how long was between them. Shortly after Aaron was Trevor, which should be red flags considering a bunch of his exes accused him of mentally abusing them.
when she dated Garrett one of my favorite Mega64 podcast moments happened https://youtu.be/R7ytxS_Mu_E
Edit: oh yeah, headphone warning on that video