Many tourist around the world like to holiday in Thailand during the high season of December through March.
During this time there is overcrowding everywhere.
Traffic everywhere.
Even lines in 7/11.
The worst thing is the prices rise drastically.
For me, I would never go on a holiday in Thailand during the high season.
The massive amounts of tourists just kill the vibe and relaxation.
If you really want to enjoy the beauty and tranquility, take your holiday outside of the high season.
Unless of course you want to share the beach with 1000’s of other noisy tourists all at the same time.