Complex sentence: There are hundreds of legitimate schools that do not have accreditation and they range from totally fraudulent degree mills boasting their own fake accreditation, to major new academic endeavors that may or may not seek accreditation status.
Split into simpler sentences: There are hundreds of legitimate schools that do not have accreditation. They range from totally fraudulent degree mills boasting their own fake accreditation, to major new academic endeavors that may or may not seek accreditation status.