Are new parts crap?

After 2 years of work I`ve finally got paint on my car, which for me sort of signals the light at the end of the tunnel. In reflecting over the last couple years I`m startled to realize that a large percentage of the parts I`ve bought were/are crap. For example 1MP orange control module(no go), 3 MP lifters(blocked oilers) , 1 warped alum w/p housing, 1 bent KYB shock, 1 rebuilt m/c(leaked at piston), 1 thermostat(sticking), 1 repo tail light lens (warped), 1 brake caliper(developed leak), 1 dimmer sw(crap in box), and 1 v/r(lasted 6 months) . These are most of the parts that something has been wrong with or went wrong with during the reassembly of the car. It`s hard enough work without adding the new part crap factor into the mix. Maybe I`m just one in a million but it sure seems like there`s a lot of junk out there that needs to improve! Have you guys experienced the same phenomenon?