Anyone can count and do the math to see when a ship is about to die, that makes it easy. The fact that there are not any numerical indications of damage means that players need experience to know when to use what.
To me, this game is not supposed to be easy, it's supposed to require tactics and skill that can only be acquired through playing on the different ships, guns, maps, and classes. This isn't a game you can learn to play alone... Well, you could, but that's no fun.