Oh wait, Did you ever saw a Normal Fast Zombie? and killed you with one hit?
Here might be the reason for u
1. U are a lagger...
2. U have a low health...
3. U got rape by a whole lot of zombie...
4. U play with a impostor who is a hacker...
I though Kurtis is a regular O.o... anyway i played with Kurtis hell lot of time and he doesn't hack... so is kind of hard to believe you, not unless u got proof...