Personally knew a lot of chefs fifteen years ago - from burger-flippers through to Sat Bains and pretty much everything in between - and back then Jamie Oliver was the best regarded contemporary tv chef among them. Several said they liked his slightly anarchic cooking philosophy, or words to that effect.
I don’t think he’s a bad bloke, actually, but anyone who becomes that famous and successful is going to turn into a bit of an arsehole. I expect I’d be a fucking nightmare if I ever became famous. Unbearable, although still very witty, obviously. .