Stardust is one of the many people who has glazed him over the years and provided him cover for being a feminist. She's distanced herself over time not because she disavows him but because she doesn't do much content creation anymore.
Any orbiter who doesn't come out in explicit terms and burns the bridge is a house slave. This includes Lonerbox. He gives up his mentally ill girlfriend and gets Destiny's mentally ill audience in return, why would he speak out?
Even Straighterade was saying that people would lose sympathy for Pxie quickly because of how she is. She didn't even think her threats warranted calling her parents or doing a wellness check. Not that it's proof but no one thus far has said she's made attempts in the past which indicates that they think she's not a threat to herself. I don't think Pxie is not-not suicidal or mentally ill because people who are mentally ill threaten suicide to manipulate people. But on some level knows that she can get people to do something she wants if she tells them that she's going to off herself.