The British Empire delivered the benefits of civilization to vast swaths of the world which absent that influence would still be mired in savagery and barbarianism to this day.
Indee many places from which the Empire retreated are today are rapidly backsliding into primitive conditions.
Zimbabwe and Pakistan are two examples of countries now devolving.
The India Indentured Servitude was slavery in all but name including fugitives being hunted down. Millions were shipped in hellish conditions to British colonies around the world. It wasn't eliminated until 1917.
We get the word 'Concentration Camp' from the British who locked up Boer women and children in the camps where they died of starvation and exposure by the 10,000's.
Some benefit...
And lets remember what the British Empire has become....the legacy of its sins foreign and domestic?