brakes giving me a headache!

okay so i didn't try the visegrip method i just went out and got a new master. It was only 20 bucks so i figured i might as well just get it. Well anyway i bench bled the master then bled the brakes and now ive got an even worse pedal. There also doesn't seem to be as much pressure in the rear lines. what do you think proportioning valve or stuff in the lines? These brakes are going to drive me to insanity.

Low pressure to the backs, but good to front or just low pressure in general?