IME a huge proportion of people who exercise do so (at least at first) because they enjoy the results (including how they feel afterwards, eg endorphins), not doing the exercise itself. The idea that only some people are wired to enjoy it and you're not one of them sounds like an excuse not to endure some discomfort to reap the benefits.

If you don't get the endorphins afterwards, that sure sounds like not being wired to enjoy exercise.

I for one know I don't enjoy the benefits - not enough to trigger any reward loop anyway. It's a known limitation for me, making it hard to consciously form habits in general. Many people have this.

(It's probably a matter of degree as well as kind - in my case, whatever the intensity/delay critical threshold is, it's sufficiently low to allow functioning, but high enough that exercise doesn't stick.)