You can certainly become habituated to taking OTC painkillers in quantities larger and far larger than recommended, and taking large quantities of acetominophen can permanently damage your liver.
Max, why did you start taking so much acetominophen, and how did you stop before?
PS I think keys to quitting include separating yourself from your supply and changing your habits that you associate with use. So if you take 3 pills each morning when you brush your teeth in the bathroom, throw out the pills & start brushing your teeth in the kitchen.