She doesn't want to change. What she has is what she wants. What she has she chose.
If her story was true, she'd be entitled to legal aid to push to get contact with her older kids - so either her story isn't true, or she's not actually bothered. She's had volunteering opportunities - didn't take it further (i.e. show up). She's had free gym memberships - instead she got fatter and lazier. She has (had?) a platform and an audience for her content - and did do all with it apart from beg.
I suspect for the most part she fell into addiction because, for a bit, it makes your life very chaotic and interesting, and distracts from the mundane.
What I don't understand now is why she keeps coming on tiktok. She clearly despises her audience. I think it's just she needs attention, even if it's bad?