Seems less fun than 10 years ago while Chiang Mai seems more fun. Bangkok is just too big. The next tier cities are improving such as Hua Hin, Khon Kaen and Udon as they get more international food.
Bangkok is polluted all year round too.
Mid Feb to mid April is the bad air in my experience. The problem with the south is much of the food is bad. Don't like southern food. Phuket has diverse food but it's Phuket and the Russians have taken over.
It sounds like you take too much vitamins. I can't sleep when I do that. Carbs help sleep so have a carb heavy dinner and a high protein breakfast. Take a warm shower. Slow your breathing down. Exercise in morning.
I know google isn't. They blocked all dissent on climate change. They probably have done the same on religion and immigration. I like google maps though but they goes astray too.
You could use a Russian search engine.