It's solely a personal decision.If you are not able to achieve a better life here in US,then it's good to go back to Nepal rather than suffering here.A good friend of mine(he was doing good here) just went back last week as he didnot like life here in US.Nowadays, more and more nepalese are going back .Personally, i know lots of returnees.It's about when you feel enough is enough.and Of course you can't compare Nepal with US,it's like making an excuse to yourself why you don't want to go back.