English colonists were unhappy with king george iii because he

They were mad because the King left them alone for many years and suddenly came over and taxed them saying that he should get money from protecting them in the Indian and British War. But the colonists were mad because they had more taxes to pay then the British people because not only for their own affairs but also for running their own country they were also mad because in the middle ages the law says that no English Gentlemen could be taxed without representation in which they didn't have and even though they lived in America is still means your an English gentlemen because an English Gentlemen is a person who has lots of money and is in a higher rank.

Hope this helped!

The King and Parliament believed they had the right to tax the colonists. They decided to require several kinds of taxes from the colonists to help pay for the French and Indian War. ... Other laws, such as the Townsend Acts, passed in Page 2 1767, required the colonists to pay taxes on imported goods like tea.

Hope it helps! :)