Have you seen Boiling Point, the Gordon Ramsay documentary from 1999?
This was when he was a star chef in London and notorious in the food world, but not yet an international TV personality.
Spoiler: He is not a nice guy. He is an utterly driven boss and brutal with anyone he considers underperforming. His goal is to achieve Michelin stars and woe to those who he considers to be keeping him from that goal.
The person you see on Hell's Kitchen is an amped-up caricature, but it is based on how Gordon really worked.
All that said: Boiling Point was more than 20 years ago, and Gordon has changed A LOT. Having a family and massive global success will do that to a man.