Cox's Bazar would not be the place I would go to for a sun filled, enjoyable holiday.
It looks like its in the middle of a swamp. And the sand is too wet.
Actually, you have wrong impression of Cox's Bazar, it has green rolling hill on the east and ocean in the west. Not many beaches can boast such beautiful natural settings. If landscaped and managed properly this could be world class resort. Still lot of work to do. Besides, if one goes to Cox's bazar there are many other opportunity like hiking, getting taste of different culture including Burmese one. You can travel to coral island Saint martin etc. If you want to get close to people and nature this is one of the place to visit.