The main purpose of a job resume and cover letter is to market you and your credentials. If you don't know how to do this, hire a skilled professional, preferably one who does it full-time. To continue to sell yourself short is to invite failure unnecessarily. You see, plain facts seldom sell themselves. They need to be organized, presented and highlighted so that a busy reader can see how his or her company will benefit from having a person like you on board.
Plain facts have little or no sales-appeal.
Because employers may conclude that you don't have any. But some also have potential negatives or turnoffs in their resumes that are not always obvious. Checking out your resume involves far more than searching for elusive typo's. That is only proofreading. There are many possible negatives that could be fatal resume mistakes.