It's a tie. We went to horribly cheap Bed and breakfast in Swansea, Wales once. At 2 in the morning shortly after we retired to bed I could smell cooking even though we were on the thrid floor and the kitchen in the basement. It was so fatty and strong I couldn;t sleep. In the morning we got up deliberately late in order to miss breakfast. The landlord and landlady explained they always start the 8am breakfast when they go to bed on a slow oven so that they its ready in the morning. We paid and were leaving in a hurry when they chased us with sausage sandwiches which had been cooked for 6 hours. That was so gross. I still can;t bear the smell of cooking brekfast to this day.
The close contender was the Sheraton in Niagara Falls in May this year. Breakfast there is fantasticche by the way. But dinner ! EEK! I love a rare tender steak. Read the menu at dinner and ordered the nearets they has a new Yorker - rare. I nearly choked to death it was so tough. I sent it back, although I didn't want to make a fuss being timid and british. they cooked it a little more anmd it was still as tough as leather. so ended up cutting it into little pieces and hiding it under the lettuce and went to bed hungry but relieved.