Stephenie Meyer is not a 
bad writer. She just writes things that a lot of people find objectionable/not matching their taste in books ("sparkly" vampires 

). That is quite different from incomprehensible drek.
Credit where credit is due: she set out to create a book about a sparkly-vampire romance, and succeeded in making a well-written ... sparkly-vampire romance.
The fact that the concept is weird and, as far as I am concerned, inferior in plot value, merely makes me a more discerning reader. 

 It does not magically make the-books-that-must-not-be-named possessed of bad writing. Which is a separate issue entirely, and someone who was unbiased would just 
write that off to different tastes.
(As you can see I am heavily conflicted. 

)