I got on the wrong side of my hiring manager within three weeks of joining. It was an uphill battle from then on and easily the most toxic working relationship I have ever endured. This senior manager exhibited aggressive, domineering behaviour and foul language. I was constantly made to feel inadequate. Any accomplishments were waved away, any errors were highlighted again and again to the point where my confidence had been completely eroded. The day I was let go was upsetting but I will never forget the wave of relief that washed over me knowing I would never have to see or speak to this abusive person again.