Saturday night live have been around for a good while now. The fact that the show have fostered many of the greatest comedians and writers should be recognized and celebrated. But due to the amount of episodes the show is very uneven. It spawned some of the best and most quotable comedy sketches but the bad ones outnumber them by a wide margin. The average grade is around 4/10 but you can't grade it without taking the contribution to comedy into account that raises the grade.
But the show is not worth seeing every week. It's better to just see the good sketches on their YouTube page.