Why did he block me?

My ex and I broke up, over the years I tried a few times to try to sort out our differences but it wouldn't end up working, the last time we tried and it failed he blocked me all over social media... then he got a new Instagram account but we never followed each other or tried reaching out to each other... but one random day like months or so later he just blocked me out of no where but I don't get why as I didn't try to get in contact or anything

Why did he block me?
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