I actually like a lot of classic rock (yes even Hotel California, that solo kicks ass) but there is a lot of bad classic rock too. What do you think the worst classic rock song is? What is the most overrated band or artist? I think Supertramp is mid at best, but Bob Seeger is truly dreadful.
They were hardly the only band experimenting with their sound at the time, especially their later albums. They are not bad albums, I do find them enjoyable (apart for the often too silly lyrics). Though the influence on the music industry is indeed undeniable.
I must however admit to disliking "psychedelic" music, be it pop or rock.