I would however, simply point out, you are trading one flawed system for another flawed system.
The flaws are different, but both are flawed.
If we're honest and say that a flaw is why we don't listen to/trust/have faith in one of the above, then we should recognize that all vessels of God's Truth are flawed.
From there, it becomes an issue of faith. I cannot fault someone for not putting their faith in organized religion. There is logic to that position. But if I'm going to harp on the flaws of organized religion, I should also point out the flaws of individualism and humanism, because they have giant flaws too. Of a different stripe and nature, but big glaring flaws none the less.