Bitcoin network.

I can't understand why the complexity is growing. Just global. It seems according to the logic of 5 percent of the equipment in data centers should break every month, plus another network such as Bitcoin Cash and other violas, plus a deficit of chips that just do not grow. And the power of the network and the complexity of just rushing fool. That supplies from the moon were set up or quantum computers went into operation. Can someone tell this great secret, I will be very grateful.