Honestly they're all victims of their own fate but I gotta admit, it sucks to be the ex. He's in a shittier situation now.
He waited for so long for his partner to come back and stayed loyal, when he decided to move on his ex (uke) showed up, and now he's breaking up with his current bf bcs he didn't totally move on whereas his ex moved on.
He's meant to stay alone and suffer (⊙…⊙ )
That nose rub ლ(´ڡ`ლ)