The long story short of Tor is that it was created by the US army to be used by US spies in foreign countries and it needs as many users as possible to "drown the fish".
"because their spies use it too" is the answer to such affirmations as "If Tor could make you really anonymous, they would not let you use it."
So officially no police, no feds, no gov agency, in the world, can break Tor. (despite the tens of thousands of pedophiles who got arrested along the years for visiting illegal onions)
They even say they don't even want to break Tor, because if they did then opponents may also be able to. What ridiculous bullshit...
Follow my reasoning:
All countries spy on other countries. Even if their own spies use Tor too, they just know that other countries also have spies spying on them and using Tor, so of course they all want to break Tor's anonymity. And soon or later they will eventually can, then they'll have a big advantage over all the other ones that still can't.
Now imagine you are USA. You love spying the fucking shit out of everybody. You had Tor created for you, you financed it, the creators live in USA, the Tor website is hosted in USA, 3/4+ of nodes are either in USA or in your slave-state Germany. You just have total control over everything about Tor, and of course you want to break Tor's anonymity.
How could you not be able to? How the fucking hell could you not?
How could Tor's anonymity be real?
To me, it's just impossible. Maybe many countries still can't break Tor's anonymity, but at least USA can for sure. Either they always were able to since the very start, or they later became able to, but it's just impossible that they let you be really anonymous.
As for the others, note how the worst freedomless police states such as Germany, UK, Australia and France where every fucking thing is illegal surprisingly don't just make Tor illegal and block it, allegedly to protect freedom of speech and stuff. Yeah sure, freedom of speech in these countries, fucking LOL. It's definitely a proof that they too have broken it, or else they would definitely just make it illegal and block it.