Not making a value judgement, just curious if that he approaches them the same as he does with work, or if he treats those a bit differently.
He settled last among our friends group. He is about 40 now. He has been married for about 5 years and before than he was with same girl for another 2-3 years.
His wife is a bit similar to him. Though I have never heard her complain about anything but art and literature are very important to both of them. Not just that they have very similar likes and dislikes. One major difference might be she is vegan and he is not. While every couple has their issues but, tbh, it seems they have fewer issues than average.
So it is like he found his soulmate and he is able to commit. (No kids yet.)
And his answer totally destroys everything I just said about him. He thinks he is less happy than an average person. He is happy but thinks average person is happier.
(I will stop now, and continue this discussion with him when we meet in person).