So the only "wrong" thing I can point to is the fermentation is done when bubbles are a minute apart statement. I still sanitize with bleach (diluted in water) as do lots of brewers. I have not see the episode recently and at the time I did see it I was not brewing beer yet so of course nothing stood out to me as wrong. I know a lot better now, but like you said, that beer he made is not going to be bad.
In the grand scheme of things, GE was not a perfect show (What is?), and many might not like his "shtick" but in my book his contributions to the cooking world are far into the net postitive side.
There were significant errors, both factual and in technique. As examples easily pulled from the first 12 minutes: He demonstrates boiling the steeping grains, which are going to release lots of tannins and is not a good technique. In the hop intro where he says the only 2 hop additions are flavoring and aroma he completely ignores the bittering hop addition... maybe he's counting on the grain tannins for that...
That said, he does a fine job for the most part, but there are vital details he just didn't communicate.