Is yours the varmint kevlar rifle? I've heard great reports about them. It could very well be it just doesn't like that particular ammunition. I guess first check the rifle to be sure all is well with it. Check your optics. Lastly try different ammo.
As far as checking the rifle, you might run a dollar bill down the barrel channel between the barrel and the stock to assure there is adequate clearance the entire length to the front of the action. If you feel any constrictions along the way, it could be you simply need to rebed the receiver. Next check your action screws to assure that they are properly torqued. You can get in touch with CZ-USA and talk to the gunsmithing department for the proper torque figures and sequence.
Next the optic. I find that most "accuracy woes" are attributable to improperly bedded and torqued actions, but next in line is the scope mounts, or a parallax issue or other lens issue with the scope. So first make sure the scope mounts are solid. One of the things I do is to buy Warne vertically split rings for CZ's. I think these are the best choice for the dovetail mounting system. If you have other rings, make sure they are properly snugged down, and that alignment is correct (don't want to bend your scope).
I do not know how to tell you to look for a defect in the lenses of your scope. If that is a problem, I guess you get there through eliminating all other possibilities.
Ammo choice is pretty simple: if it won't shoot this ammo, try something else. Mine loved the 55grain Hornady Vmax bullets. I couldn't miss with those.
Lastly of course is shooting skill/technique. There are books on that subject. It takes quite a bit of skill to shoot tiny bughole groups. If you are "learning the ropes" as it were, be patient with yourself and perhaps concentrate on follow through. In essence stay in position long enough to see your bullet strike through your scope. I like to say, make your line of vision a laser beam through that scope. Concentrate on the point on the target where you want the bullet to hit. This at least for bench rest shooting, use the set trigger.
I'm sure others will have suggestions, but that's all I have for you this morning. I have always enjoyed the CZ rifles. They shoot great, are well made, and over time have always come through for me.