If you supported Sanders in 2020 but are now supporting Trump, it's well within people's rights to question how politically sane you are.
You don't have to be insane to be in this position. Most of these are just more drawn to the anti-establishment political aesthetic than to the gritty details of policy, and being drawn to a vague political aesthetic is hardly a trait unique to Sanders-Trump voters. Democrats and Republicans alike rely on people voting for all sorts of reasons wonks might turn their noses up at, but their disdain is no reason not to understand why voters swing (and, as an implication of that, how to persuade them).