Why is my ex still following me on instagram (but he thinks I am awful)?

I was dating a toxic guy. I will not write about the things he did because it would be too long. I will only mention how it ended.

I got drunk at a party and got an injury. A friend who envied my scholarship started spreading rumors about me, when i was in hospital. A friend of ours, whom I confided in with problems with my ex, joined her. Of course, I discussed these problems with my ex, but he always made me crazy so I confided in my best friend. However, when he found out, he called me a monster and broke up at me laughing but he continues to watch my stories. And I wonder why?

INFO
Me and my ex are men and this two ex friends of mine are women.
Updates
+1 y
I would also like to add that my ex best friend whom I confided in is now dating my ex and they both follow me on IG and he watch my EVERY story.
Updates
+1 y
I agree that sometimes it's just curiosity or we just follow many random people. However, I think that when you tell someone that they are a monster and you don't want to know this person, you don't look at they instastory every day. Especially since you only see that person's best moments.
Why is my ex still following me on instagram (but he thinks I am awful)?
Post Opinion