India was third class nation with people dressing in dhoti kurta, bullock cart travelling, stupid ash on the forehead, and dominating brahmins, and no real proper judiciary in place before british came.
ZERO and that's it. Suddenly it all stopped and you could not move beyond bullock carts for 3000 more years !
Look what english invented. 100 nobel prizes from Great Britain alone, every key inventions.
What I am saying is that what you suggesting boycotting UK invented stuff is WRONG.