Complex sentence: The ADR system also made it the responsibility of the former students to prove that the abuse occurred and was intentional, resulting in former students finding the system difficult to navigate, re-traumatizing, and discriminatory.
Split into simpler sentences: The ADR system also made it the responsibility of the former students to prove that the abuse occurred and was intentional. Many former students found the system difficult to navigate, re-traumatizing, and discriminatory.