"Bad writing" means different things to different readers.
We writers notice bad writing far more easily than readers, because we know the rules. For us, the writing is critical, but for a reader, it’s more about the story.
Readers don’t care how the sausage is made as long as it tastes good. And “good” is very subjective.
No matter what genre you write, I bet you can name a few huge, mega-bestsellers you feel are badly written. Every genre has them. And they drive us crazy as writers because “writers must write well” is drilled into our heads by everyone in the writing and publishing industry.