Dude just leave him alone. Let him be happy in his delusions. My blue pilled days were great in a lot of ways. Sure there were frustrations when I couldn't get anywhere despite "doing everything right". But I doubt I would be where I am today and successful in any area of life if I had been blackpilled too young.
If he's happy let him be happy. A happy lie is better than a depressed truth. Truth has no objective value. Happiness is all that really matters.