TBBT is a show written by non-nerds trying to describe what nerds are, and failing miserably.

I have tried more than once to watch it and every time I felt actual physical discomfort at how bad the whole thing was; Even though the show is not strictly about nerds but rather a parody of SV culture, I find HBO's Silicon Valley to be so much better at describing nerds than TBBT - at the very least I can actually laugh at the jokes and there are slight hints that the writers actually know what they are talking about.