I recently came back to Nepal after living in US for about 8 years. However, I did not have citizenship or Green card of the USA. Coming back to Nepal is joyful for me and I do not have a single trace of regret of leaving US. Sure, there are differences in quality of life and yes these are vast if we look in terms of air and water quality, road conditions, population density etc. But if we take some time out of our normal life and indulge in hiking and trekking in pristine natural places, we will be thrilled to enjoy our heavenly nature. I used to visit many natural places in the USA too but the contentedness with our natural surroundings is extraordinarily enchanting. I used to drive a car in the USA and now I am using motorbike for my daily transportation. Regarding the internet use, I have no problems at all. In the USA, I used to have 110 mpbs speed and now I am using 25mpbs from the wordlink. In theoretical term, it is a huge difference in the speed but in my experience the speed difference is subtle. My suggestion for you is that first come to Nepal, try to struggle and enjoy life here. If you find that you can bear the negative aspects of living in our motherland, take bliss in this wonderland and if you do not have future ambition of worldly financial, education or career success focused on the USA, you can renounce US citizenship later even in US embassy Nepal. But at the moment, it is better just to visit Nepal and try to start your life here. Best wishes.