Good question: I read that years ago there was many people calling BTC anonymous when it really isn't. Sounds like the early users pulled off a huge scam on the world? I still love crypto for small payments, but you need to be careful going forward.
You can make your Bitcoins fully anonymous with coinjoins. Wasabi Wallet, BTCPay Server's coinjoin plugin, and Trezor's coinjoin account prevent the addresses in your wallet from becoming linked to each other.