the colonies had no representation in Britain's legislature
Explanation:
"The colonists believed that the acts were intolerable, <em>especially since they had no representation in Britain's legislative system.</em> The 13 colonies, once separate, joined together in order to retaliate against Britain."
Well, when you think about this, everyone would yell, "NO TAXATION WITHOUT REPRESENTATION!!" Also, I am taking APUSH this year, so I would have to say that their greatest complaint would be the fact that the colonies had no representation in Britain's legislature; even though, the colonies were complaining about all of these. Don't quote me on this, but I hope this helps you!!