What complaints does Capt Preston have against the colonists?

Captain Preston's complaints against the colonists primarily revolve around their aggressive behavior and hostility towards British troops stationed in Boston. He describes instances of verbal abuse, threats, and physical assaults against the soldiers, which he argues create a tense and dangerous environment. Preston believes that the colonists' actions undermine Law and Order, posing a threat to the safety of both the soldiers and the civilian population. Overall, he feels that the colonists' provocations justify the military presence in the city.