My ex’s brother unfollowed me?

So I was dating this guy for almost 2 years and he became extremely abusive after the lovebombing stage and all of that. It got really scary and bad. I finally was able to get out. My ex’s brother witnessed several abuse situations go down because while I was over their house he heard it and put a stop to it and had to almost fight my ex to make it stop. He told me he knows his brother is insane and mentally ill and just crazy. It’s been 9+ months since we’ve officially broken up and his brother has still followed me on instagram up until today? He unfollowed me lol. I’ve been blocked by my ex but he still texts it’s so stupid. But his brother and I don’t speak don’t engage, nothing. I rarely post on instagram either so I don’t know why after this long post breakup I am being unfollowed by his brother? His brother is very nice and always has been nice to me and he still follows my ex’s previous girlfriend though…but unfollowed me. What do you guys think this means? I just find it a bit odd because we’ve been broken up for a while, my ex and his previous ex have obviously been broken up longer and the brother still followers her. Just seems a bit of weird timing. Let me know your thoughts. Thankyou!

My ex’s brother unfollowed me?
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