If you don't allow yourself to heal, to forgive yourself, then you won't be able to overcome this addiction.
Monk Mode was a way for me to say no to some of the instant gratification I so often sought. I could say, "No, I'm in Monk Mode right now. I need to focus." It helped quite a lot. But that phrase in and of itself is just a tool. It can help in the moment of temptation to get you through it, but eventually it grows stale without some kind of long-term commitment.