Complex sentence: It is a double round robin event (every player plays every other player twice, once with each colour) at normal time controls, unlike the Knock-Out FIDE World Chess Championship tournaments held since 1998 which were criticised for using fast time controls.
Split into simpler sentences: It is a double round robin event, where every player plays every other player twice, once with each colour. It uses normal time controls, unlike the Knock-Out FIDE World Chess Championship tournaments held since 1998 which were criticised for using fast time controls.