Your post is completely disingenuous. You blow up, pause, and write more without removing the rude reaction? Yeah, that's just drama and attitude. You are reading far too much of your own personal shit into something that isn't there.
Josy has a great father, a cold mother, a stepmother with anger issues (but we have absolutely no proof of any abuse, verbally or physically to Josy), Tommy (who's Tommy, but has apparently never physically abused her, and the worst we know he did was steal her nail polish. In fact, she's the one who's been violent to Tommy, multiple times).
Josy is the one who has an irrational problem with her stepmother and stepfather, she admits it very early on. She blames the steps for the parents being broken up, even though she likes that her parents are happier now. She blames her mother for her dad cheating, too (saying she nagged him too much).
Look, I love Josy. She is cute, sweet, and fun. She is a mess if you zoom in, but who isn't? Yes, she is excessively upbeat as a coping mechanism, there are worse traits to have. I think her insecurity issues are more an issue with the constant drama and stress of the past year taking its' toll. Being in a throuple instead of a couple (if you're on that route) probably exacerbates that issue because she so strongly wants to be in a relationship, but in a throuple it's less about her.