How is this possible? - Toyota Corolla, 1.4L, 2006

Now I'm going with MOT and immediately with indignation the pads began to whistle, well, I ordered new ones well, I think the front and back, although it was strange to me why they died after 30 thousand, well, I think the figs ordered when I took off the front ones at zero and the rear 15 % of wear in general I'm angry as a sabak and I plan to buy completely new brakes, I understand that it will be the cost of 1/4 of the car, but it will not be killed so quickly and no matter how active it is,
here are the pictures of the pads themselves