Just how big was Kazon space.
How does a ship on a one-way direction, at high-warp for 2yrs, keep running into the same people. It seems preposterous that Kazon-Nistrom were always ahead of them waiting somewhere to cause trouble when they don't have ships anywhere as fast as Voyager.
Plus, the Kazon came across like bumbling buffoons, and were weak as main antagonist. It was amazing they were even warp-capable.