I met an amazing mentor while doing my masters in the US who hired me to work for a company where he was the COO after I graduated. I’m an immigrant to the US, so my visa is conditioned upon being employed: get fired, and I would quickly get deported back to the Middle East.
The CEO of that company was planning on selling the company to a much larger British firm, so he wanted to maximize revenue in the short term so that he could get a better price for it. He also had a huge ego, and so did the sales VP. She was convinced that I was too young and inexperienced for my job and tried to sabotage me quite often.