The British are given too much credit for things they never did. As for doing good in India, even under the Mughal empire, India is estimated to have a share of 30% of world GDP until the 18th century.
When the British left in 1947, that share was less than 1%. The Brits de-industrialized India, used Indian raw materials and taxes to fuel their own industrial revolution and used India as a captive market to hawk their finished goods under an absolute monopoly.
I know, I know. You might point to the railways, English education, civil service etc. as the 'good ' they did.
The railways were first added in the mid 19th century, and the Brits expanded them only when rail saved their arses in the first war of independence of 1857.
The Education they imparted was a colonial project to wipe out and subjugate the local natives, and give them enough English to serve as clerks in running the Empire. Educational institutes of any lasting value were started by local Hindu & Muslim reformers and intellectuals.
So please save this orientalist reading of history for yourself. We Indians don't have anything to be thankful to the British. Good riddance to them. Hope we never see their sorry faces again.