Squeaking brakes

Hello guys! That makes me crazy!!! My brakes squeaky like pig… I drive about 2 km, then it starts. I can’t even drive with an open window. Have already removed about 2 times the brakes and greased them with copper paste… But does not help. Does anyone have another suggestion? Have you heard anything about a component in the brake that is wrongly dimensioned from work, or something like that…? If you change that, should it go again?… Please help, I’ll be mad otherwise! …!!! Thank you! MfG shaf