Complex sentence: His slowness, inability to understand things and incessant honking and hooting slows down and greatly annoys the others, particularly Quentin, as well as Worth, who is often tasked with babysitting him.
Split into simpler sentences: His slowness, inability to understand things and incessant honking and hooting slows down and greatly annoys the others, particularly Quentin. Also Worth, who is often tasked with babysitting him.