What does it feel like to raise a child you're not proud of?

My friend had recently had both of his children fail school and forced to repeat a grade, but however he refuses to talk about it with me or anyone else. How exactly do people feel when they raise a child they're not proud of?
Update: I'm not trying to be a jerk to him or anyone else. I'm legit curious as to seeing if they don't care or are truly hurt by these things
Update 2: I don't have kids of my own so I'm very clueless
Update 3: My friend is visually upset over this, but just won't talk to anyone about it.
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