Alright, so I have good news and bad news. The good news is, adjusting the rod has made them a lot firmer, the bad news is, my booster has an air leak, so i need a new one . For anyone reading this with the similar problems, just pump the brake and listen for leaking air from the booster. I actually discovered the leak when playing with the rod, i moved it sideways and heard air leak from it, so tried pumping the brake and heard air.