Well of course not and they're entitled to their opinion just like me. I'm sure his accent wasn't the overriding factor in all those awards and I didn't say it was bad, just fake.
The US is full of British actors who frequently have to fake US accents to get work. Anyway I doubt many Americans have ever seen too much of Hugh Lawrie in his many British shows - had they done so I'm sure his US 'accent' might have seemed not quite so pukker. Of course it's equally possible they might have thought his British accent wasn't very good.