re: I have heard that "The Patriot" is terribly inaccurate and offensive to the British

More colonials died in British prisons than died in battle.

"During the American War of Independence, more Colonist Americans died as prisoners of war on British prison ships through intentional neglect than died in every battle of the war combined.[6][7][8][9][10][11][12][13][14] During the war, 11,500 men and women died due to overcrowding, contaminated water, starvation, and disease on prison ships anchored in the East River; the bodies of those who died were hastily buried along the shore.[15] This is now commemorated by the "Prison Ship Martyrs' Monument" in Fort Greene Park, Brooklyn in New York City.[15]

Christopher Vail, of Southold, who was aboard one such British ship the HMS Jersey in 1781, later wrote:

'When a man died he was carried up on the forecastle and laid there until the next morning at 8 o'clock when they were all lowered down the ship sides by a rope round them in the same manner as tho' they were beasts. There was 8 died of a day while I was there. They were carried on shore in heaps and hove out the boat on the wharf, then taken across a hand barrow, carried to the edge of the bank, where a hole was dug 1 or 2 feet deep and all hove in together.'

In 1778, Robert Sheffield of Stonington, Connecticut, escaped from one of the prison ships, and told his story in the Connecticut Gazette, printed July 10, 1778. He was one of 350 prisoners held in a compartment below the decks.

"The heat was so intense that (the hot sun shining all day on deck) they were all naked, which also served well to get rid of vermin, but the sick were eaten up alive. Their sickly countenances, and ghastly looks were truly horrible; some swearing and blaspheming; others crying, praying, and wringing their hands; and stalking about like ghosts; others delirious, raving and storming,--all panting for breath; some dead, and corrupting. The air was so foul that at times a lamp could not be kept burning, by reason of which the bodies were not missed until they had been dead ten days."[16]

LINK

frick the Brits.