I agree with Ike, here. It’s not the fact that you might not like Bob Dylan’s voice that is a problem. It’s the claim that his voice is bad, or that he lacks talent, as a singer. The first is a matter of taste, and you are welcome to your wonderbread. I like rye.
I once had a few bottles of Chateau Lafitte-Rothschild, (a seventy six, for those with enough savvy to be jealous, and yes, it was just what they say.) I had a few friends over, and poured two glasses of dark red wine for each of them. One the premiere vintage of the second half of the century, the other, Gallo Mellow Red, of the current month. (The screw top, not the bag, there are limits, after all.)
My friends preferred the Gallo, thank you very much. Not a problem, really. They like sweeter tastes. But the fact that the Rothschild lost five to nothing in the test does not make it bad. It was good. Really good. But it was not sweet.
Dylan is not sweet, nor is he mellifluous. He does not croon. But he has a great voice. His voice is not pretty, but it is great. It puts forth his passion, and does so with an emotional precision seldom heard in popular music. He rocks, he raves, he cries, and he scornfully declaims himself.
You might not like Bob Dylan, and you might not like Chateau Lafitte-Rothschild. But that does not make Dylan a hack singer, and it does not make the wine swill. It does say your palette is unsophisticated. Sophistication is not better, but it is different.