Mindsets like this are actually why democracies fail.
In that case, why have a state government? Why not have everything determined county-by-county?
In fact, why have it be county rule? Why not just neighborhood by neighborhood?
You place the locus of control according to the problems you need to solve. Neighborhoods combine to cities combine to counties combine to states combine to countries in order to be competitive and thrive against the broader environment. Yes, it does typically entail a loss of autonomy, but the benefit is that your little independent enclave doesn't get taken over by the next-strongest neighbor.
It seems like you don't understand how checks and balances work in our system.
In the context of this concrete discussion, allowing customers to cancel contracts they don't want - that's something which you object to because you want companies to be allowed to keep taking your money against your will, because consent matters to you? That is obviously self-inconsistent.
Really, of all the places to get worked up about the 10th amendment, a clear-cut, low-risk, low-intrusion expansion of consumer protection is a weird one.
Because we aren't a unitary democracy, we are a federal republic that was built upon the idea of a limited federal government designed to address pressing national issues, with "The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people." The will of the people state should almost always be superior to the will of the federal government. There needs to be an exceedingly pressing and relevant reason that any law, let alone one made by unelected bureaucrats, should overrule any of a state's laws. There is no exceedingly pressing reason the federal government should be involving itself in the process of canceling an auto renewing contract.
>"why is it okay that people should have to vote on whether others can prey on them, exploit and abuse them"
A company making it slightly annoying to leave an agreement with them is not being preyed on, exploited, or abused. That kind of language to describe "sitting on the phone longer than I want to cancel my paper subscription" or similar is bordering on histrionic.
Are you saying this because you believe it, or because the Constitution says so?
I think rote but beneficial consumer protections in the digital age is something that fits well at a national level. We don't need a 50-state laboratory on how to handle SiriusXM.
Oh, and making it artificially difficult for laypeople to get out of subscription contracts is absolutely predatory.