Yes, as an author, part of your job is to proofread your work. If this author published the work before it was actually ready, than I have zero sympathy for the author respective of the comments - next time publish quality work rather than blaming the readers. And yes, I know how hard it is to edit a publication, knowing several published writers - all of whom understand that editing is time consuming and much work, but simply part of the process in turning quality work.