Tbh... its spammy as forget. Its obv that all you did was make one section out of a 4x1x5 and dup it a million times. The outlines on the bricks make it look even worse and the one single color is even worse. I suggest you give the rock a bit more shape and randomness, add some color layers to the rock. And use larger bricks. Other than that I tyink you have a good thing going here and it has good potential. Sorry for my harshness, I was just being honest.