Girl WHAT???????

I thought the which was his ex, and that he did like something terrible like cheating but NO???? She just likes his ex, that had some shit going on her life, she broke up with him and which decided that HE was at fault for making her sad??? Like gurl make this make sense??? I get not liking ex’s but to curse him??? When he didn’t even do anything bad, it just doesn’t make any sense seems like she was just angry for what happened to her needed someone to take the L and chose to blame ex when even the girl herself didn’t seem to blame him