I never said it was. If some three letter agency with a budget of billions of dollars is coming after you, then yes, it's going to be very hard to remain anonymous. That's hardly an argument for just throwing your hands up in despair and giving up on privacy, though. There is a big difference between being a focused target of a state-level agency and willingly handing over all your details to the complete strangers behind some two-bit web wallet and the third party ad companies who pay them.

Transactions taking place without delays is really the bare minimum metric to measure a wallet by. You are completely ignoring the massive invasion of your privacy as I outlined above, and the massive risk to your coins you are taking by holding them in a third party custodial wallet. Using a custodial wallet means you could lose access to your coins, or have them stolen, at any time for a myriad of reasons you can do nothing about.