Brake Disc Pads Problems of Toyota Yaris

My 2007 Toyota Yaris sedan; when I apply brakes to slow down while at high speed on rough roads,I can feel like the sensation of no intention of car to stop,I feel the brake pads in front or rear brake shoes like in a jerking motion,I feel the motion in the brake pedal,I visually inspect brake wear often because of this,brake shoes lining are very thin normally by factory, I even bought new brake shoes and did not installed them because there was not much difference between old and new linings,aside from that I am content with Yaris ,I am 60 yrs old,driving since I was 19,drove commercially in the past, could there be a problem with the brake system of 2007 Yaris,I never felt such sensation in brake pedals while slowing down at high speed on rough roads while driving any vehicle,could you look into that? I don't know perhaps is nothing, sometimes I say lord I hope I never have to make a sudden stop at high speed to realize that there was a problem with the brake system,while driving I always keep that in mind.

See all problems of the 2007 Toyota Yaris 🔎.