Complex sentence: Abrahamian returned to the event to compete in the resulting bronze bout and won, but after he received his medal at the officiating, he stepped down the podium and dropped the medal in the center of the wrestling mat, and left the ceremony.
Split into simpler sentences: Abrahamian returned to the event to compete in the resulting bronze bout and won. He then stepped off the podium and placed the medal in the center of the wrestling mat and left the ceremony.