Do not worry Gleeks, for I shall defend thee from the h8ers!
Yes, Glee is ridiculous on just about any level. It's also served as a terrific medium in my family to get our kids even more interested in music, to help them recognize bullying and bigotry and envision ways out of it, to begin to identify appropriate boundaries of sexual behavior when the time comes, and, as mentioned, to illustrate for them that the most important thing about gay people is not the "gay" it's the "people." Not that it's one big public service announcement, it's a soap opera like any other, but it's also contains flashes of great humor and some terrific vocal performances.
For those who've just scratched the surface I can see that you would find it insufferable. (I did for a long time 'til my wife dragged me in.) But like many things, once you invest in it you can find a lot more there to appreciate.