Myanmar’s best beaches you can get to reasonably easily are not at Ngapali, not at Ngwe Saung and certainly not at Chaung Tha.
They are here on the Dawei peninsula. I was there in 2014 and for a long time early in 2016 then again in December 2016.
If you are looking for information on Myanmar’s tropical paradise beaches the best place to look is the blog I created on 2014 and have kept up to date ever since .. click here.
For info on getting to Dawei overland from Thailand .. click here.