You need an explanation to why you get along with some people immediately and why with others, you could just try to do everything right, take an interest in what they do, try to make them laugh, and you still won't get along with them.
I've found my explanation. It beats agonizing about what I might have done wrong for ages. In fact, I've done just that for years, and it ate me up. Until I realized that no, it was not my fault.
No one gets along with everyone, no one can bond with everyone, don't pretend you do because that would be some major BS.
You can't change who you are anyway. As cliche as it sounds, you can only be yourself in society.
So you just have to do that, and then see what people think: "Hey, that guy's pretty cool!"
So yes, I believe we get along with people or not based on genetics.
Of course, there's no scientific evidence to support that claim. Yet.
It's a bit of an intuition I have. I also know when a situation is hopeless, I know when I just can't win.
I've always known, but somehow, in the past, I thought I could still win: "Surely if I say the right thing!"
Whether it was with a girl, or any other social situation. My brain scans all the possibilities and I'm like:
"Nah wouldn't work, wouldn't work, wouldn't work" The joy (and curse) of hypersensitivity.
But according to some here, there's always a way. I don't believe that.
Like with hair loss, sometimes you have to admit that there's no solution, no way you're going to win.