We've seen the mountains of old clothes she still has, I think she has the mindset that she'll lose the weight and get back to her 2020 body (seen below), which was, I'd guess, a size 12-14 maybe. And so she refuses to buy nice things for her current body (size 16-18?), so it's all just cheap, flammable Shein stuff.
I also believe she lichrally does not want to look classy and put together as she thinks it won't attract men and is thus futile. She seems quite hyper sexualised and like her only worth is through men lusting after her.
Also found this absolute gem of a head transplant while looking for the pics above: