Customer service

A job which causes your ass to bleed like hell, your psyche to be corrupted by severe hatred and psychosis, and which has significantly increased the suicide rate of humans. You always have to take it up the ass by these whiny, bitchy, brain-fucked assholes that are called "customers" who do nothing but scream, complain, and make your life a living hell. Finding an actual intelligent and non-bitchy customer is like selling a pack of Grand Prix cigarettes: it's so fucking rare that it almost never happens.