If you don't get Dylan, that's too bad. Over-rated? Surely you jest. Can't sing? Ask any artist who has tried to cover a Dylan song if he can't sing. They tell a much different story. Producing a pleasant tone with your voice isn't really the point at all, if you consider music to be a form of communication and a language all its own. The words you pick and how you give them a unique meaning through your intonation of each word and phrase is the key, and nobody in the 20th century did it better.
Saying that a person can't sing because you don't appreciate that particular tonal quality is like remarking that somebody can't play the clarinet because you don't personally like the sound of clarinets.
He was right about recordings, too. They are atrocious, by and large.
I don't agree that no good music has been made in the last 20 years. Lots of good music out there. Badly recorded, though.