Why were the British colonist upset about the proclamation in 1763 Apex?

The British colonists were upset about the Proclamation of 1763 because it restricted their westward expansion beyond the Appalachian Mountains. Many colonists, eager for new land and opportunities following the French and Indian War, felt betrayed by the British government, which sought to avoid conflicts with Native Americans. This anger contributed to growing tensions between the colonists and Britain, laying the groundwork for future opposition to British rule.