'Kahneman tried to explain the hedonic treadmill via with his own aspiration treadmill. He claims that he not only failed, but the data were opposite to his hypothesis.'
https://www.edge.org/response-detail/10056
Uh... what that Edge article you are linking shows is that 'experienced happiness' which he thought would be a better measurement of happiness than life satisfaction is even more immune to your life circumstances:
"This was the first of many such findings: income, marital status and education all influence experienced happiness less than satisfaction, and we could show that the difference is not a statistical artifact. "
This only strengthens the OP's opinion...
He does tell us at the end of the article that GDP correlates with the happiness levels of countries. But that doesn't really detract from the OP's reasoning. (Who knows if that's even causative, instability & war could cause both GDP & happiness to drop.)
Even the study you are linking suggests revisions, and is far from 'disproving' the hedonic treadmill theory.