Thailand is like any other country, if one takes the trouble to understand the rules, speak the language, and enjoy what it has to offer. IMO good food, beautiful women, a life as simple or as complicated as one wants to make it. There are a lot less rules here than Australia.
If a retiree is going to come here with limited resources, refuse to learn the language, live off western food, drink excessively, and lose their head over women, it's almost inevitable they will be disappointed in their choice of retirement destination.
A problem can also be an opportunity. I regard driving in Thai traffic as honing my survival skills, and helping ward off Alzheimer's.