The desire to get rid of addiction is also a desire. Whatever desire is strongest dictates what you will do. The problem is no one can freely change their own desires. If I could make myself hate procrastination and laziness and addictions and sin of every kind, and enjoy being productive and kind and practicing gratitude, then I would be able to control my actions easily. Whatever I think is best for me, I would do it, without question. I just need to will myself to desire it enough. It can still be argued that this isn’t absolute free will, because I’m still a slave to my desire to be happy and healthy, and perhaps my actions are still fully determined by biology etc. True free will is incoherent as a concept, but practically speaking, being able to change your desires, or willing what you will, is free will, and we do not have that. The best we can do is meditate on a certain idea, certain reasons and images that might inspire us, but this obviously doesn’t always work. Especially because the very decision to begin such a meditation may not even be desired in the first place. You end up in a long chain of having to motivate yourself to motivate yourself to motivate yourself..