I have absolutely 0 problems hitting a zombies head by aiming at it, am I really the only person?

The only problem I've ever had with vicinity has been on top of the lockers in the second floor of the fire stations, other than that it's 100% fine in my opinion - You can seemingly struggle to find some items in the boots of cars but that's easily worked around but aiming at the item and pressing in the mouse wheel, not a big issue.