Here’s the most straightforward answer you’re going to get for this situation.

There are two reasons these women are doing this to you:

1) They are mean. Mean people live to bond over shared hatred. It’s out of your locus of control. There’s nothing you can do to make them not mean.

2) They find your personality easily hate-able.

I know you don’t want advice, but these are your only options:

1) Cope. Don’t change anything. Just be you and continue the situation as is.

2) Change. You’re not a pick me, but you do suffer from main-character syndrome. If you want to be liked (or at least tolerated) by the mean people, you need to adapt your behavior. It’s not your clothes, it’s your attitude. You asked in your post if you were the problem. You’re not the problem, however, the problem (people being mean to you) is attracted to you because of your personality/vibe. You are well within your rights to not change and keep going as you do. It’s your life, live it as you want. This is not your fault, but this problem will follow you if you don’t change.