Quick comment. If you love the writer then you'll put up with it. If you like the writer then you won't.Yeah, this.
As long as the art is serviceable and carries along the story I have no problem. If it is bad to the point where it is distracting, then drop it.
Just be thankful it isn't bad art and bad writing.
I'll never forget:Yeah, Nick Fury's Howling Commandos still ranks as the worst in art for me. Seldom is the art so bad that I can't figure out who is supposed to be talking, but that one left me mystified multiple times.
1) Nick Fury's Howling Commandos by Giffen and the horrible art of Eduardo Francisco.
2) New Invaders by Allen Jacobsen with dreadful art by C. P. Smith.
Two of the worst drawn books I've ever read.
Answers
So having said that (and this is coming as a writer), if the artist isn't good, I'll lose interest quickly if not drop the book outright (or never pick it up at all), and that's regardless of the writer.
I guess you can say of the fundamental core of the story is there then it doesm't really matter about any other shortcomings. If the basics of the story aren't there then any bad art will seem monumentally worse.