“It’s okay to fail” seems like it would have been a more valuable life lesson than “it feels good to beat a really hard video game” and it concerns me that you’re so okay with the amount of trauma this entertainment product caused him.
The fact that you’re sharing this story of years of repeated meltdowns caused by a video game and calling it an example of games being beneficial is pretty surreal.
My point is that I described the same distress you're describing using the same terminology you did. I didn't accuse you of anything, I just strongly disagreed with your takeaway that this story describes something positive.