Exactly. They made it clear Syd never liked to be touched, not even as an infant. It's also clear that the person Syd switches with generally has no idea what happened when the switch occurred. It's not like mutants are plentiful on the show so to them it seems like a loss of time. You have mom on the couch, naked and wet. You have Syd in a shower fully clothed with mom's naked boyfriend. So it's not surprising her mother thought the worst or even that she had been drugged and raped herself and that the boyfriend was trying to do it to the daughter next. (And I'm assuming what happened to the body during the switch carries over when the body gets switched back.)
Then again: how would she even explain what happened to her mother in a way that would make her believe her or even the police? "When I touch people I switch bodies with them!" If she proved it successfully that would have been worse for her. (Not that this excuses her but mutants are treated horribly.)
Also there's this whole underlying idea about mutants that their abilities are related to themselves. So, essentially, she manifested abilities related to her personality. In essence: if she never manifested powers the "no touching" thing would have continued to exist. However since fate decided she would be a mutant, her powers are related to that. (The reverse is true in some mutants where, while they don't have powers, their bodies sort of know what power they will get so -- Syd starts out as someone who doesn't want to be touched to prepare/protect her.)
What Syd did was wrong. There's no way around it.
If she is a victim, she is a victim of her own abilities. Not being able to touch another person completely screwed her up. As a teen with no support, like she'd get from the X-Men for example, she dealt with it the wrong way.
She survived having to go through life like that and by her recent "experiments" it's clear she has reached a stage where she is much more willing to use her powers. I think the thing is: people make mistakes and at that age, I could see her not owning up to it. The problem is, as an adult, Syd didn't seem to have any regret about what she did. I think that says who she is, and it's not a pretty picture. All of the incidents in her life she shared with David brought her to that point: it's not about love, it's about being tough.
It says a lot that David spent relatively little time in everyone else's maze trying to help them while with Syd, it was clear she was there to teach him a lesson. Long after everyone else had stopped feeling the effects of the Monk, which she technically would have and did too (chattering teeth had stopped as a matter of fact), she wasn't about to let him get off easy. In a way it was horribly twisted.