I would say good conversation is what two people comprehend if there's no comprehension
Then the other person would just see the other as an idiot or something along those lines
Also as we get older it's Harder to fit people in are lives because we have already developed hobbies, interests and where we want to go on holiday
It get harder to find people that matches our lifestyle
In may ways it's easier when you are young because both people's can go and build a life together easier
The issue in this just seems like that you both where not an intellectual fit because you have both develop hobbies and interests
That are conducive to both of your selfs
I remember from my dating experience getting into Manga, fanfiction and anime when getting to know a woman
And to tell the truth I thought it was boring as hell along with the crap music of catfish and the bottlemen
That not something I would be willing to put up with any more and for me I love politics, geopolitics, history and psychology
And I love a woman who has the same intellectual interests and curiosity
I know nothing about physics and I would not be an to converse with somebody in that discipline
We would both just think the other is an idiot even though it's far from the truth it's just human nature