The game is actually very consistent, but your clubs are not. Unfortunately, even when you ding a shot, it may go 5-15 yards to the right or left of where it ought to have gone due to randomness intentionally added into the game.
Sadly, some people want to see this randomness increased. In their opinion, you should shank balls, balls should fly 20-40 yards off-target, and/or the frequency of 5-15 off-target shots should be increased. I find this to be highly ridiculous, as it would make the game akin to a roulette table much more so than than a skill-based game, and it is also a lot harder to learn the game and/or a course (if such a thing is even possible under such a system) when where your shots go has so little to do with where you actually aimed them.
As far as the greens go, they are actually extremely consistent and so is your putter. The only real problem with putting is how WGT has implemented the grid system: unfortunately, the distance in between the grid lines is too far apart to see all the little bumps and valleys in the path of your putt.
All of this can be chalked up to the "realism" of the inability to achieve perfection in real life (e.g. you will never hit a shot after shot exactly the same -- where they all fall in the exact same spot -- anytime you believe you've hit a perfect shot; you will never be able to read every single detail of a green, no matter how close you look at it; etc.,) but yes, it can be annoying at times, and I most certainly don't think that the severity of randomness and imperfection should be increased, just to make people quit shooting rounds of 58-64. If WGT wants to put an end to that, they can just add in sloped lies for fairway shots... something that can be figured out and adjusted for (even if adjustments that we will try to make are not 100% accurate,) not simply some randomness that is completely uncontrollable.