Complex sentence: Instead, he is a controversial figure because he used a great deal of mind games and psychological tricks, was frequently accused of cheating, and has been disqualified and suspended from sanctioned play for cheating on the Pro Tour.
Split into simpler sentences: Instead, he is a controversial figure because he used a great deal of mind games and psychological tricks. He was also frequently accused of cheating and has been disqualified and suspended from sanctioned play for cheating on the Pro Tour.