Eh, a job's a job. And it's not his fault the aliens were acting the way they were. How could he have known they would be less than challenging? Still, I have to give him sac points for walking into that sewer and that hospital hive. There were supposed to be actual xenomorphs in there, afterall. And a predalien. Say what you will about wolf, but guts wasn't his problem.
I prefer to look at his inability to properly contain the xenomorph infestation this way:
It's a xenomorph infestation, it doesn't take long to be overrun. Especially with a predalien on the loose making babies faster than God knows what. If nothing else, it solidifies the point that they can't really be contained, even by the best warriors. All he could've done was detonate his wrist gauntlet. And he may have done that, if it hadn't been for the predalien.
But I freely admit, it had reached the point where he should have, even before he made it to the hospital. I can only guess he was trying to avoid nuking the place and bringing attention back to his species. If the military hadn't stepped in, there's no telling how bad things could've gotten. Wolf was just outnumbered. I can't blame him for not being able to cork that bottle. He may have been tracking down the one responsible for the procreation, but it was too late. He raised some hell though.