What exactly do you mean by "hard to use?" Does your bike run well? and does the electric start work ?
If you fail to kick it entirely to where the spring recoils back you can get a pressure build up and the next kick will be significantly harder to kick over.
If you think about what a kick starter actually has to do, its difficulty may stem from from either kickstarter gears themselves, or the actual engine trying to turn over. Turning over an engine so that it can start is tough, which is exactly why they invented an electric starter haha
Just make sure your engine is in tip top shape, and you have good oil in all the right places and thats about as easy as you are gonna get...