Lot's of really good recommendations here already. One series I don't see discussed much is the Acts of Caine series by Matthew Stover and I think it's exactly what you're after: shit talking, badass, tortured anti-hero in a deeply depraved and corrupt world with copious violence and sex and a deep and well written story.

Each of the 4 books is self contained but they are worth reading chronologically, starting with Heroes Die. The audio book is also fucking terrific.

https://www.goodreads.com/book/show/311864.Heroes_Die