No, it is best to use a resume template. Hiring managers will not reject your application for using a resume template to format your resume. In fact, they will appreciate you submitting a resume that is easy to read and includes all of the information they need to make a hiring decision.
Resume templates are developed to look professional, meet industry standards, and be easily read by applicant tracking systems (ATS).
You need to make sure the content on your resume is unique to your circumstances, and that the template design is appropriate for your target job.