I typically don't mind if there's small grammatical errors every few pages. But if the sentence structure is consistently confusing, and there are several glari

I typically don't mind if there's small grammatical errors every few pages. But if the sentence structure is consistently confusing, and there are several glaring mistakes, it usually signals to me that the author didn't care enough to proofread/edit their own writing. If the author doesn't care why should I?