https://www.theguardian.com/technology/2018/apr/12/facebook-how-to-quit-delete-account-addiction-what-to-do

Like you, I have no idea how to wean myself off the platform, but acknowledgement is the first step to recovery

I am too far in to leave Facebook, but I want to register my disapproval of the company after their part in the data leak to Cambridge Analytica. What should I do?