Hunting with a spear was usually a group activity with the animal cornered in a circle of them by squat guys in skins, scared into running off cliffs on to sharp stakes at the bottom of a pit, or used against an aggressive animal like wild boar from horseback. One guy on foot against any animal the size of a deer would be extremely dangerous. Live action steroid fueled cartoon characters like Rambo might jump off tree limbs to impale a boar with a spear, but the rest of us ought to stick with firearms or bows.
Lots of spear hunting was done with dogs.
The human-dog predator team is very hard to beat.
Probably reason #1 why they all went extinct, and someone invented firearms. Heh.