Avindian one thing you should do next time.
When you post screenshots don´t cut the top bar always. I wanted to compare my score and population with yours but couldn´t
In particular I think liberating India was a big blunder, as I have 1300 military score by 1903 and I bet in large part that´s due to India (didn´t make protectorate, without raising troops from them). Only dominions I did were New Zealand, Austrália, Rhodesia and Fiji. Managed to make all of Canada into states as well as almost all South Africa. Do you know what was your score by area and population by 1900?