I think you read it wrong, parent is calling him "one of the few successes" which to me actually is recognizing his achievement, but instead of "this is great", what he sees in the story is "how the hell was it so hard for him in the first place, it shouldn't", so it's a difference in perspective, but not that he does not recognize his success (that's my perception).

That being said, of course I agree with you. I was once enrolled in a community college program out of fun, thinking I would actually learn something, but with housewives and retired people in the class, the progress was next to nil and I dropped out pretty quickly, at first I was angry, but it actually gave me a glimpse into how hard even the easiest things were to them. I could read something for 5 minutes and be able to recite it, they would struggle with it for an hour. Not to say I am a genius, but one should really take advantage of all the chances while young, that's what I got from it, so I guess it was worth it.

So I deeply respect his achievement.

Clarification: Though I also partly blame the teacher for the bad experience, but that's another story entirely.

Edit: In case someone missed it, not so long ago this was on HN "Learning Chess at 40", very interesting read https://news.ycombinator.com/item?id=11653538