What better way to never take responsibility for their actions than to conspicuously lavish a brand new woman with all the praise they were too arrogant, stubborn, unconcerned, or comfortable to give you? That way they can alleviate themselves of their guilt at being an ass with the simultaneous effect of emotionally breaking you down.

It's easier to blame you and pedestalize the new woman than admit failure or reconcile themselves with the fact that they were the bad guy in the situation, because everyone wants to see themselves as the hero and not the villain.

Just know that these men don't change, they just change tactics.