Apart from a few nauseating puffs in high school, smoking was about as enticing as a root canal. My first day at college I walked out to the fire escape of my dorm where several people were hanging out, smoking. I started a pack-a-day habit then and there that lasted two decades.
Over that period I tried to quit multiple times- cold turkey, nicotine gum, nicotine patches, cinnamon sticks, and a few things I have long since forgotten and none of it worked for more than a week or so. You have to really want to quit to actually do it. Willpower is a limited commodity, some people have a bigger reserve of it but not even the Dalai Lama can run on willpower alone. For many smokers wanting to quit, you need to find a new habit to replace the urge to light up and for me vaping was that habit.