I think the average middle class Thai is happier than westerners.
1 they live day by day
2 they arent obsessed with history or trivia outside their circle of life
I have known Thais for 20 years. They have a more steady sense of fun. Farangs are up and down. Very good or very bad. Buddhism teaches more mid level approach to life.
Something is only good or bad if you place feelings on it.