Personally, I don't find Mav's comments to be out of order. He/she has been perfectly polite IMO! We're all friends here hopefully..?
I'm not a fan of 'Not Going Out' either -- I find the two lead characters to be very broad caricatures of people who I'm not sure exist anyway, and if they did I wouldn't find them interesting. That's me trying to be honest, not rude, and it's just my opinion.
I watched Lee Mack's standup show last night, and thought he was terrific, very funny indeed. And I've often wondered how NGO would be if different people were saying the very same lines of dialogue, because it's often very sharp. But, for me, the two aren't gelling.
There have been many classic sitcoms built around a standup comic (indeed, what is arguably the best one ever made is in this category), but it doesn't always work -- again, my opinion only.
But fair play to anyone getting a sitcom to, so far, three series on BBC One and for it to be enjoyed by so many.