What was it about america that made some people in 1776 so opposed to the system of monarchy?

The correct answer to this open question is the following.

By 1776, the majority of American colonist truly supported independence from Great Britain. Indeed, the Declaration of Independence was issued on July 4, 1776, during the Revolutionary War.

People form the colonies were angry with the English monarchy due to the heavy taxation without voice and representation in the British Parliament. Taxes such as the Stamp Act, the Sugar Act or the Tea Act were big causes that started the Revolutionary War.