I bet this woman was abused in many ways as a child, some of them may have been sexual but certainly there was some significant emotional abuse.
Yes and no.
In reality, no. Nobody ever touched her.
Your hunch nevertheless is insightful in terms of having zeroed in on the right personality complex. She did fabricate allegations against her father despite never having seen him since the age of 4, and had claimed that this was why she was lesbian and hated men (no, sexual abuse will not change your sexual orientation but I have heard the same claim from other women with BPD). She had severe borderline personality disorder, and one fairly common symptom of that is victimization fantasies. Sylvia Plath (whose father was in no condition to molest her--he was bedridden and dying), Eileen Franklin, Jennifer Bennet (who helped send an innocent man way for 18 years for a crime that was impossible to have happened), the anonymous 9 year old who started the "Wenatchee Sex Ring" hoax, etc. I would also hazard a guess that her mother had it too--it is strongly correlated with heredity.
Andy Warhol spent the rest of his life in chronic pain and slowly succumbed to the damage to his liver that she did when she shot him. That's what eventually killed him. I am impressed that he performed as well as he did in his last years.
There is a rumor that she shot him because he lost or stole the only copy of her play "Up your ___", but that is not true. The woman who wrote the play "I shot Andy Warhol" found 2 copies. I would be extremely curious to see a copy of it, because I know something about the subject matter and I suspect it would provide some very interesting insights. It is known that nobody took an interest in her until after she shot Andy Warhol, and the shooting seems to have been related to a vague belief that he was keeping her from stardom.
In case it's not obvious, she's a cult legend among feminists. NY NOW paid her legal dream team that got her off with a short stint in psychiatric prison followed by a miraculous recovery.
Solanas' last days were pretty horrific. She ended up a junky in a welfare house in San Francisco, supporting herself with prostitution which must have been particularly hellish for someone who really was profoundly misandric. One day the housekeeping staff found her maggot-riddled corpse. Asphyxiated on her own vomit.
A lot of Warhol's "beautiful people" (as they called themselves) ended up in similar situations. Warhol was one of the few (only one?!) who was relatively free of drugs and mental health issues.