Problems with 2012 Nissan Cube TIRES

I changed the original tyres of the car after 3 years of normal wear out and replaced them in october 2015 with pirelli cinturauto p6 tyres. i drive an average of 10,000 miles per year, the air pressure in the tyres is the correct one as specified by the car, and i drive on country roads but very carefully. in december 2016 the right front tyre showed a bulge on its sidewall so i replaced it immediately with another cinturauto p6. in january 2017 the left front tyre showed a similar bulge on its sidewall so i replaced it immediately with another cinturauto p6. in may 2017 this left front tyre which had been replaced in january 2017 showed once again a similar bulge on its sidewall so, once again, i replaced it with another cinturauto p6. and now, in november 2017 the back right tyre has exploded, i was not aware if there had been a bulge in the sidewall of this right back tyre as i would have replaced it immediately if i had seen one. pirelli blames my driving and does not offer me any warranty. i blame pirelli because i don't think a tyre should be so delicate and because i never had any problems with the original tyres of the car with a similar type of driving. as the tyres have been failing one at a time i have had to keep replacing the defective tyres for the same model but this last explosion has scared me and i am going to replace all four tyres with others that are not so delicate.