Why do you all hate Greg?
Mmmmm. You really are very late to this aren't you Each?
The reasons are legion - but among them are that he is patronising, ignorant, greedy, talks with his mouth full, eats with his mouth open, pervs over the younger lady contestants, tries to act as though he knows what he's talking about regarding the finer points of haute cuisine, when he has obviously never eaten anything more haute than a bag of Pickled Onion Monster Munch before he managed to get a job on the telly, wears a stupid cap, wears stupid waistcoats, wears stupid shirts*, has excessively shiny cheeks (probably slathered with melted butter from sticking his snout straight into the trough), keeps giving contestants "useful" advice (even the professionals - this is rather amusing though, as you can see the contempt in their eyes) . . .
. . . that will do for now.
*And so obviously thinks he looks rakish and suave