Shitty ass friends

So let me begin this by saying I am a pretty good friend. I don't think I'm better than others but I think I'm a good friend. So I had this friend in hs and she was all around kind of a shitty person. I would do anything for her but when I needed help she couldn't be bothered. She had a group of friends that I joined as well and recently this girl who hates me for whatever reason has become friends w friend number one and her group. I don't know why but it's weird. Anyway. This girl in that group recently screenshotted a pic of me on someone's snap story at my bday. So the girl who posted the snap of us in the first place confronted her and was like why did you screenshot me and my bff. And she said "nothing against you but I had to show ****" I find it creepy that some person I don't associate w anymore is screenshotting pics of me to show to this ex group of friends of mine. I really wanted to cut all ties w this group but like when they're screenshotting my pics to talk about me itskind of hard knowing a whole group of people are shit talking you it's also super creepy she has pics of me they're just looking at for fun. Any idea why they're acting weird like this. Also they still like my pics on social media which is weird. If they hate me so much why care what I'm up to 🤷🏽‍♀️🤷🏽‍♀️