"Dylan uses "bad grammar" deliberately and knowingly because he writes in the vernacular of the American working-class"
Does he (not arguing as my knowledge of U.S. vernacular speech is limited to freely available recorded versions - Archie Green, Studs Terkel and Sandy Paton's and others' wonderful Appalachian albums - Ray Hicks, Dillard Chandler....?
Vernacular speech has its own disciplines and logicalities - and certainly, it's own beauty and power - at its best, it is an art form in itself (listen to Sam Larner or Gordon Boswell or Jack Elliot on the Radio Ballads).
For the U.S., try Aunt Mollie Jackson or Nimrod Workman or Texas Gladden - masters?mistresses of the vernacular all.
Dylan's narrative qualities have always struck be as unattractive and somewhat uninteresting.
Maybe I missed something.
It's true that some working class speech can be ugly and dull, but if you are coming at it from the outside you need to present it at its best to make it work
Jim Carroll