Getting fed up...

Right there with you... I completely rewired my GFs 79 VW bus cause it was a electrical hack job. Got it running again and decided to replace other electric switches just to feel better about everything being new.. ****, worst mistake.... I got so sick of diagnosis of all the electrical components that I loaded it up and sent it to a older VW repair shop for them to pull their hair out.
I also work as a service writer at an automotive shop. DAILY I'm dealing with crap parts from all vendors. Best ones yet are suspension parts that are new but manufactured NOT to spec... we pulled out hair out wondering why it wouldn't come into spec for alignment.. damn control arm was too short . Sucks but what do we do?