While it doesn’t take much to get to the level where you can fairly reliably win HoE games with a good team as a bezerker, there is a huge gap between a “decent” bezerker and a “masterful” bezerker. However, trust me when I say that bezerker, contrary to popular belief, actually has one of if not the highest skill ceilings in the entire game. Most bezerkers I see these days just run Katana +3 and go around M1 mashing everything, not exactly skillful gameplay. This is true, and to play a decent bezerker capable of winning HoE games, you don’t actually need to be all that good.
It has been described as having a low skill ceiling, and that anyone can play bezerker decently as long as they know how to parry. Berzerker has always been seen as a rather easy class, both in KF1 and KF2.