all of the restaurants were already on the verge of closing. they all had a mountain of debt, serious management problems, problems with staff, with the food, with the sanitation in the kitchen, and always massive interpersonal drama between the owners and the staff that would prove terminal for any business. so, having anyone, no matter how brilliant, swoop in with a remodel and a menu refresh and a bit of team-building for a week isn't really going to turn places like that around, especially when they have deep-seated problems that have been brewing for years, even decades in some cases. frankly, a lot of those places should fail, and many should never have been in business in the first place.
if you want to blame Ramsay for anything, blame him for tricking the audience into thinking that these places ever had a chance of turning things around.
If you had ever watched the show, you’d realize that most of those restaurants had a 0% chance, regardless of what Ramsay did. That 20% managed to turn it around and stay open - especially surviving covid, which killed countless successful restaurants - is amazing.