Whats your opinion when a girl’s ex still talks to her brother & plays game together even after knowing the girl has new boyfriend? ?

Just curious what would he feel. Asking for a friend actually & feel sad for him abit. The ex n the girl been together almost 3 years. They broke up. But he treated her badly thats why she left. After 3 months the girl found someone that treats her nicely.
Whats your opinion when a girl’s ex still talks to her brother & plays game together even after knowing the girl has new boyfriend? ?
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