The US is a representative, constitutional democracy and a federalist republic. What does government oppression (aka tyranny) look like in such a government?
What will we choose - bowing down to the terrorists who would reject the states' authority to protect the public from COVID-19, or standing up to them even if that means using the National Guard to do so?
"No mask, no service" is only controversial because the people affected by it are used to being on the giving end of such restrictions, not the receiving end.
Not all opinions are created equal. Opinions that are informed by facts, data, logic, and science are better than opinions that are not. And opinions that are based on fantasy, misinformation, wishful thinking, and ignorance are the least of all.
Wearing a flag (or even a flag-printed shirt/pants) is not patriotism, it's nationalism and jingoism. It's also disrespectful of the flag per the US Flag Code (4 US Code § 8). If you don't like being criticized for being disrespectful, you have it in your control to stop wearing flag clothing.
The old normal is gone, and the new normal is yet to take shape through the dense fog of the present.
There comes a point when the people demand the government do something. When the majority is large enough, that's not tyranny anymore - it's representative democracy in action. At that point, if the government fails to do what the people demand, that's tyranny.
I put "he/him" in my Twitter profile, and I love it when "conservatives" claim it's against science. That is incorrect. Sex is not binary at the genetic or physiological levels. Gender is defined culturally, and many cultures do not have strict binary genders.