Are you going to tell me you've never read a book that you say after the first few pages and/or first chapter that it sucks?
In case you didn't realize promos are designed to show the "best" of a movie or a TV show, so if those "15 second networks promos" are the best that show can offer, my statement stands.
No, I didn't. Honest... I ran out of gas. I... I had a flat tire. I didn't have enough money for cab fare. My tux didn't come back from the cleaners. An old friend came in from out of town. Someone stole my car. There was an earthquake.......
Fort Erie, ON
Invalid comparison, elwood.
Watching a full episode would be the same as reading a chapter. If you had watched an episode or two of the show and came to the conclusion it's not for you, fair enough. People have different tastes.
What you're doing by watching a few 10 second promos during a commercial segment is like opening up a random page of a book and reading the first three words of a random sentence only to come to the conclusion that the entire book sucks.
Promos are designed to catch attention to watch the show just once. More often than not, they will take something completely out of context to catch your attention and watch, only for the actual scene in the show to be nothing like what the promo claims. These promos don't exactly highlight the wittier humour or interpersonal situations that takes more than 10-15 seconds to think about. These more detailed situations are what will bring you as a viewer back, not a new promo each week.
Ergo, as NCRGuy said, you're talking out your ass.