Regarding being dual-taxed, the US has dual taxation treaties with almost every country, so you can deduct the taxes you pay to another country from your US taxes. e.g. If you move to France, you'll pay taxes there, and when you file in the US you'll get credit for those taxes paid. There are numerous other complications for federal taxes as well! But you probably won't flat-out pay double.
Just remember that it gets easier, I think a lot of people struggling with addiction to unhealthy food try to resist temptation for a day and go through hell. They think "I can't live the rest of my life like this," but the thing they never make it far enough to learn is that it doesn't feel this hard all the time. Every night I go to bed resisting a sugar loaded soft drink I wake up stronger, and the sabotaging gut bacteria is one battle weaker than the healthy gut bacteria.
So hey if you have a citizenship somewhere else that is among one of the cool, slightly respecting rights of citizens countries in the world, and you never want to go to the U.S because reasons (including never wanting to work there - which seems weird given your digital nomad lifestyle) go ahead, renounce it.
Today’s sunset around Puget Sound: https://shademap.app/#47.89056,-122.66785,7z,1635813675213t