I'm sorry OP has to go through this but that's simply how the business world works. It's pretty-fucking-ruthless. You're still a kid if you think these trillion dollar empires were built on credibility, ethics and values. The management is shameless. Middle management prefers boot licking in hopes of career advancement and all the manual labour trickles down to the younglings.
As far as having disgusting, down right pathetic colleagues, yes that's a genuine problem. More so if you're a female.
At the end of the day you gotta do what you gotta do. Or exit the capitalist world alltogether.