At first glance, it would appear that the vast majority of the ex-colonies have been very successful. Great Britain was indeed “great.”
As for the social, economic, and political disasters pushed by your local university lib groups... let us remember that they have never come up with anything that actually works.
One should treat the typical lib prof in the same manner as we tech types treat someone who believes in perpetual energy, global warming, or electric cars.
I dunno. Free market economies and representative government are all fine things but the Brits have cricket to atone for.
Whatever good came from British colonization was certainly not a result of British good will. They just ended up losing their colonies and left some structures that were useful to those who they had exploited to the max.
"Free speech" may still exist in the U.S. de jure, but certainly no longer de facto.