On TBBT, my comment was more referring to its treatment of geeky subject matter and geeks in general. I've seen a lot of criticism about the show, and it's certainly easy to find on Google. One of the best posts I've seen on the matter is this one on Tumblr. YMMV, of course.
I think TBBT certainly has its flaws (my personal pet peeve is the rather unrealistic characterisation), but I think that blog post you linked has far more of them. He seems to want things both ways. He wants the show to be aimed at a 'mainstream' audience (as opposed to what it identifies as geek shows like Veronica Mars, Buffy and F&G), but then complains about the things in the show that actually allow it to do so. Of course the majority of people watching will identify with Penny more than the four guys and Amy - that's the idea. Every sitcom essentially follows this same format. You'll have a cast of characters who are eccentric in various ways and then the 'straight character' through which the viewer observes their world and their interactions with ordinary people. That's what allows shows like this to appeal to a mainstream audience in the first place.
He never says it out loud, but the author seems to be deeply uncomfortable with the show because it highlights, and ridicules many of the things that he is himself insecure about. When me and my (geek) friends watch TBBT, we laugh when the show makes fun of various aspects of geek culture. We are all in our mid 30s and long ago lost any of the social embarrassment associated with being geeks. Maybe it's because he is young (he says he is still at university) and the memories of getting bullied at school for being 'different' are still fresh. Maybe I would have felt the same 15 years ago. He seems to be wanting a show where somehow geeks were portrayed in a realistic yet wholly positive light, as if that would somehow make him feel better about who he is and make society understand him better. Rather than a necessity, he seems to think it something of a betrayal that a show about geeks dares to make fun of them.
I don't watch much TV, but I've seen enough of TBBT to strongly dislike it--not because it makes fun of geeks/nerds, but because its
premise is making fun of geeks/nerds. I mean, you have to poke fun at everyone, it's a sitcom. But without the making fun of geeks/nerds aspect, there is literally no show.
In addition, the portrayal in TBBT is... beyond over the top. I mean, your average nerd/geek looks a lot more like me than the guys on TBBT. They've taken the extremes and are making fun of
the whole spectrum of geeks/nerds by
focusing on the extremes, despite the extremes not being what the average nerd/geek would likely wish to represent them.
Now I could play the victim card here; this sort of misrepresentation of women, minorities, etc. happens all the time and is pretty awful. The difference here is that
nerds run the world so, you know, make fun of us if you want. Just don't complain when we don't come to fix your computer.