I care if my partner has an orgasm. I prefer if he does, but have no hang ups if he doesn't. He has some old injuries (former military) that flare up on occasion, so sometimes we have to do a rain check on having sex. Unsurprisingly, when that happens my concern is for him to not hurt as much, not "oh no he didn't ejaculate". We talk about everything. Often. So I have no issues of any sort about it.
Sometimes people are stressed. Sometimes people hurt. Sometimes stuff doesn't happen. If it happened often, we would communicate to determine what was going on. The only times I've been intimate with someone and they haven't had an orgasm during sex was because of health or it was part of kinky play. Old injury flaring up, migraine developing, orgasm denial, etc.
In any case, I like people I'm intimate with to enjoy themselves as much or more than I do. Sometimes that doesn't include sex. Sometimes that doesn't include orgasm.