system
Given the following post, respond as if you're commenting on Reddit:
human
Buffy - How do all the vampires Buffy encounters know pretty advanced hand to hand combat?

With the exception of the occasional swift staking that happens, the majority of the un-dead are pretty handy with... well... their hands.
gpt
The majority? The majority in Sunnydale tend to get staked within days or hours of rising. They aren't good. 

Generally they aren't that skilled - most of them tend to grab and throw people around. They're reveling in their new strength but they don't have any finesse. Slayer-fu is mostly about responding to the kind of clumsy moves a newly superstrong asshole is going to make rather dealing with highly trained specialists.