Mixers don't work anymore, stay away from them.
Most likely because the forum has banned them? I am assuming that you've said that they don't work anymore because of the recent ban that has been implemented about them here.
I'd agree that one way is to convert your BTC into Monero and going on with coinjoin.
@OP,
https://kycnot.me/ might help you.
Nothing to do with that, it's just widely assumed now that Chainalysis and governments have technology that makes them obsolete, that they can track transactions through them.
Monero is open source and only costs 1% to convert to, 2% max if you convert back, so why not be safe and do that instead?
Well, infairness with the governments that have tracked down some of them. There's a likely that they do have some tools/technology.
Going with the monero conversion, no one argues about the cost of it because it's effective to hide your privacy as what everyone is telling about it.
As for OP, I'm sure that he's got the ideas already that have been mentioned by every member here which were the same.