When braking hard the brake pedal went to the floor?

The brakes went out. I would mash the brake and it went to the floor. So, I changed the master cylinder and booster and then I could barely push on the brake, it was too hard. I changed the brake shoes and bled the brakes in the correct order. I drove it a short distance and they seemed fixed. The next time I drove it after about 2 miles I had to stop and loosen them because they were sticking and started smoking. Long story short, I thought they were fixed until I got stuck in a mudhole. When I got unstuck and started driving the brakes were grinding and growling and started sticking again. What could have happened?