I don't think DDP was putting him down for it. He is just saying it is gonna be remiscent of the trauma he went through, which is probably fairly accurate because he is planning to beat the ever living shit out of him.That's the brutal reality of the sport. Obviously it is meant to also get under Sean's skin, but I don't see a reason why that would be putting down anything about an abusive past.
He is just keeping it really real, like Strickland likes to do himself. It's just an uncomfortable truth.