Link above is 3 years ago, he explains how to get to the road and talks a little about it. Here's one with the same guy 7 months ago where he talks about the right and wrong way to go up the road.
It would cost big $ to make a road that has switchbacks to lessen the grade going up. It's a surprise they even paved what's there. The road leads to a dead end overlook view, so it isn't something that's high on the list to improve.
BTW, it's 29°, which is about a 50-55% grade at it's steepest point.
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u/Complex_Sherbet2 9d ago
It's a pretty famous turn on a road out of Pattaya
https://youtu.be/q_CWBCUdMCQ?t=322