I just watched a kid lose a wrestling match. He came off the mat in tears, went over to his dad and said: “I suck!”
But the fact is, that kid doesn’t think he sucks. He thinks his dad thinks he sucks. That’s about 100 times worse and it makes me want to cry.
NuckolBall 
That’s always a very hard discussion to have. It’s sometimes best not to agree or disagree, just be ready to listen!