cutthroat
adj.adj. describing a situation where people are very competitive and willing to do anything to win, even if it hurts others. It often feels like a 'cutthroat' environment where you have to be the best to survive.
adj. characterised by extreme competition and a willingness to use ruthless or dishonest tactics to achieve success. Often used to describe professional environments or markets where survival depends on outperforming others.
The tech industry is a cutthroat place to work.
In a cutthroat market, companies often lower their prices to the point where they barely make a profit.
The cutthroat nature of the publishing world means that even established authors must constantly produce high-quality work to maintain their visibility and sales.
From cut + throat.