There is an ad on E4 that advertises a bunch of TV shows, and the clips for The Big Bang Theory as part of that promo show only 2 things:
1. Sheldon saying ‘Well don’t just stand there, get your breasts out’ to Penny.
2. Sheldon addressing a WOC at her job by saying ‘You are black, aren’t you?’ and this woman looking incredibly uncomfortable.
Both with a laughter backing track.
If that doesn’t sum up the entire show and why it sucks, I don’t know what does.