Complex sentence: It is believed that his ongoing struggle to control his weight has led to increasing fits of anger which has resulted in numerous red cards and accusations that he has engaged in racist and sectarian behaviour against fellow players and members of the public.
Split into simpler sentences: It is believed that his ongoing struggle to control his weight has led to increasing fits of anger which has resulted in numerous red cards. It has also led to accusations that he has engaged in racist and sectarian behaviour against fellow players and members of the public.