What you said is not true, it is only your opinion.
As for 'freedom, the colonies were not enslaved or imprisoned. They objected to being taxed without being represented in the British government. Dodging taxes is hardly akin to being under a tyrant's boot.
History would have been VERY different if there had been no war of independence. The resulting pan-European wars would quite likely have not come out of that. The result would have been a more stable Europe, no Peninsular war, thus not leading on to the the Great War. No Great War would have meant no Versailles Treaty, no crippled Germany, and no seeding ground for the Nazi Party, no WW2 in Europe. Following that it is entirely possible there would have been no Cold war, no wars 'by proxy' (Korea and Vietnam)...