Question

why was it extremely difficult to rule over the Indian subcontinent

Answer 1

Because we now that India is diverse country so it will be difficult to rule over Indian subcontinent according to it's different languages in different state

Answer 2

It was extremely difficult to rule over the Indian Subcontinent because of we now that India is a diverse country with different languages, and states.

Therefore it was extremely difficult to rule over Indian subcontinent unless the ruler has the adequate military power to subdue the kings of different state who had also military powers.

After the end of the Mughal empire, there was no power left in uniting Indian states.

British East India company had great military power and could send 2000 troops and they will be squashedThus they were able to rule over India for such a long period.