I'm sorry about your experience of bullying when you were a teenager. This type of psychological behavior is almost always caused by a lack of adequate, psychologically sustainable parenting at home.

That's great that you stopped smoking when you were a teenager. It is neither a healthy nor intelligent thing to do.

Teenagers often think that smoking will make them look more mature and adult while in the eyes of adults, it only makes them look infantile like a pathetic intent to look mature by the glorification of smoking. TikTok and Instagram are full of videos and photos with that teenage behavior.

Turning into exercising is very important. It is basic health care and should start at an early age and continue until we die of old age. It is even more important to keep muscles conditioned and heart-healthy as we age. Muscles help in metabolism and healthy metabolism prevents aging :-)