The team in which I worked, and one member in particular, were extremely unfriendly and unpleasant to work with - in over a decade in the working world, I have never felt less welcome anywhere as I did there (even when I lived in the South!). It was immediately obvious from the moment I walked in that my face didn't fit, for whatever reason.
The management and HR did absolutely nothing when I raised concerns that my colleague's behaviour had escalated to bullying/harassment, as defined by the terms of the company's own handbook. Rather, they decided to let me go, citing fabricated "performance issues" - when in fact, my manager had been nothing but positive about my work and progress, in spite of the atmosphere in my office. Absolutely appalling and disgraceful conduct.