Not at all
Generally speaking, most people want to survive. As such, they don't mind being carried to safety and given medical treatment if they're mortally ill, and in fact generally expect it. Now, this might change if the person has made it clear they want to die—but nothing like that happened here. Qrow hasn't expressed any desire to die, and in fact was poisoned while trying very hard not to die. It would be a little perverse to deny that obvious impulse by leaving him to die and continuing on.
Plus, it's not like he's unconscious the whole time, either. It's particularly notable that he has plenty of time to "heroically" tell them to leave him and save themselves, and doesn't, probably because he knows that their odds will be better in the future if he's alive, and that he's not greatly holding them back. If he had any objection, he'd have said it, instead congratulating them:
Qrow: It's quiet. Good job, kiddo.
They're not just wandering about aimlessly, either: they're trying to get to Mistral (specifically to Haven, as you guessed), which Qrow had previously (i.e. after being injured, but before they knew about it) advised them to continue doing.
Qrow: So, we're on our way to the headmaster. Haven't heard from him in a while, even before the attack. I'm hoping he has the answers.
Given that it's a kingdom, the odds are good that they'll have better treatment than team RNJR can manage on their own. Their detour to the destroyed village is fairly logical, too: if they can find some medicine for Qrow, and keep him alive until they get to Mistral, everyone wins.
To back this up, it's not as if Qrow shows any resentment that RNJR saved him, either. Quite the contrary:
Qrow: Hey, aren't I normally the one saving you?