Lurking my “ex” social

Well..its been more than 10 months since we went in our own paths (she is a psychopath so no she did not leave me alone) we were in a relationship that literally had no name for it we loved each other so bad that we did everything together but one day she said for me “did you think im your girlfriend or sm?” That where we fell apart week after her words i found out she got a new partner so i furthered myself away but she kept trying to make me stay by her side as a friend she doesn’t want to lose and when i finally blocked her and fell in love with someone else (turned out it was her friend ex lol) she kept trying to mess our relationship up by saying bad rumors about her to me and the same to my girlfriend ( in the name of taking her friend revenge from her ex “my new girlfriend”) well at the end she kept talking shit about me with her partner and tried to ruin me as much as she can and she also reached to my friend to keep talking shit about me , but finally she decided to stfu and go away 1 or 2 months ago , so im happy with my current relationship but i still lurker my ex instagram account and her partner accounts , i really dont know why, maybe im hoping to see her lose everything? Idk? Deep down ik if she reached out to me i would ruin her more. (Btw before all that happened we knew each other maybe 3 years ago and i hurted it her back then (we were not in a relationship) and then she reached for me again when she moved on and got dumped and that when all this happened)