Your internal monologue should be nice and wholesome and reassuring to yourself at every micro-moment possible. Keep trying to modify it until your inner story is habitually posutive. That's literally it.
>I have issues with demons like narcissism, impulsivity and lying
>to the absolute maximum extent
You have some grand immense dark narrative about yourself and your place in the world that weighs you down until your life is like trudging waist-deep through wet clay and you lash out at people and develop insane neuroses and shit as a result. This is because you aren't using the most fundamental tool in a man's toolbox to dissipate the constant stressors of life which is reassuring self-talk. Let go of literally every other narrative device and self-description that has lodged itself into your mind and poisoned you all your life. The voice in your head should sound like
>Man, I'm glad I made a little progress toward my goals today
>I'm so glad I have four walls and a ceiling to sleep under
>[thing] didn't go how I wanted today, but that's okay
>I made a mistake when I did [thing], but that's okay
Literally if a thought enters your mind and it doesn't contain the phrases "I'm so glad..." or "that's okay" eject them instantly. If you have beliefs that make these thoughts hard to generate, get rid of them.
Or don't! The more mentally raped self-injuring freaks there are running around out there, the less competition I have for great relationships, grrat job opportunities, etc