You’re right, but you’re missing my point that it doesn’t solve the problem. Seceding only makes your current concerns worse. How is seceding a real solution? Answer: It isn’t.
You are allowed to leave this government but seceding isn’t the only option, nor is it practical nor realistic in comparison to the actual options available to you. For example, you could do so by leaving this country for another existing country - not forming your own.
Good luck finding a better one that already exists and I mean that sincerely. You might just find a subjectively better country for yourself but you’re probably going to need to learn a new language or two; and your voting rights may be severely curtailed if you even have them at all. And, you’ll need to secure a job there before you can even move. In fact, securing foreign jobs is harder in almost every country than it is here in the US. One of the reasons why so many want to come here. It’s an incredibly arduous task but it’s not impossible.
Keep in mind, all of that is still much easier and practical in comparison to your solution of seceding even with the insanely simplistic outlook that we don't have to have a civil war just to make a very small number of people happy.
Or.. you can stay in this country, participate in it’s elections, take the elections seriously, push for the changes you’d like to see, be practical and realistic with your choices and your solutions, don’t take it so personally when your preferred candidate loses, and do not confuse political opposition with domestic tyranny. Like an adult.