The part of India that neighbors Bhutan is extremely un/de-industrialized, and due to years of insane 'SJW-liberalism' driven politics, is as bad as the worst of sub-Saharan countries in terms of development metrics. India also gives away electricity for free to farmers (due to similar idiotic populism), and compensates by charging industries more (grid losses in India are also very high). To say that demand side is anemic is an understatement.

Bhutan doesn't have the best relations with Nepal either after the ethnic-cleaning of Nepali Hindus (1/5 its population) from Bhutan. Nepal, ofc, is as poor as India (though better than Bihar).