I'm probably older than you are - calling the USA a "police state" is a steaming pile of bullsh*t. We the people can still hold free elections, have a free press, and can criticize or campaign against our elected officials without ending up in jail, or in a box 6 feet under.
Eritrea, Uzbekistan, Belarus, N Korea, PRC, Russia, Turkey - now those are police states.
The US is a police state as a champion of mass surveillance. Even the Stasi didn't have such broad spying powers over the populace (I am not that old but I am old enough to remember the Stasi and siblings).
You are not really free when you are subject to mass surveillance and have no right to
privacy. In America privacy is a dirty word.
Americans have limited freedoms including freedom of choice. In terms of press freedom: the US has been sliding steadily off the charts. Also, I would think that the country that has the highest rate of incarceration in the world must fit the definition of "police state" better than any other country. And the militarization of law enforcement in the US is plain crazy. The country is looking more and more like a battlefield with proliferation of swat teams, tanks and heavy weaponry visible even in small towns (hint: war surplus).
It's true that you still have free and fair elections, even though they are tainted with suspicion (not just Russian hacking but suspicions of fraud, inadequate voter registration etc).
The problem is lack of choice (party duopoly), democracy is diluted, the real decisions are made behind closed doors and your vote is increasingly meaningless. Not just a US problem though. Just because we have free elections doesn't mean freedoms are not being eroded (and lost for good). Democracy is a sham when you don't get a say (and influence) in the stuff that matters. When you vote for people who confiscate your voice and act against your interests, we have a failed democracy.
I guarantee that if you expose some serious government wrongdoing, you will end up in jail or in exile in Russia. On the other hand, the real criminals, those who violated the Constitution, they get a free pass or they are rewarded, even when they commit perjury by lying in front of Congress (Clapper). In a normal country, the president and the incumbent administration would have to stand trial for abuse of power. For example see Macedonia (still a very imperfect democracy). In the US impunity is the norm.