I think that the Tor network is proven to be broken by feds if you are suspicious.

The Tor network was in fact used to reveal the identity of someone (https://www.techradar.com/pro/security/german-authorities-apparently-cracked-tor-anonymity-but-onion-heads-say-its-still-safe) but as we don’t know the truth we cannot really make conclusion but we can act that :

(Tor is always more secure if you’re opsec is great from the beginning)

For example you’re one of the biggest drug dealer and you’re doing 100 000 of deaths every say, for sure they will cramp up to you and find you, succeeding to deanonymize you.

But most of the time you are not that attractive so you will be mostly anonymous. They can target an entity to reveal it but cannot deanonynize the entire network