coinjoins don't help with privacy at all. that's why they're trivial to detect and why they get your accounts blocked if you receive coinjoined sats. they only serve to reset the pseudonymity. but they can't erase the history of your coins, they just give them a new history: "this user went out of his way to try and erase the history", which is what gets you blocked. bitcoin onchain is never private and only weakly pseudonymous.