Lack of self-control means acting against our own better judgment: scrolling for hours, losing our temper, overeating, overspending, saying yes when we meant no. Afterward comes regret, and the cycle repeats. It is a common struggle, not a rare flaw, and it grows when we are tired, stressed or bored and the mind looks for a quick relief.
The Gita takes this struggle seriously. In Gita 3.36 Arjuna asks what drives a person to act wrongly even against their will, modeling honest inquiry into our own self-defeating behavior. Gita 6.6 says a controlled mind is a friend and an uncontrolled mind an enemy, and Gita 2.67 compares a wandering mind to wind carrying a ship off course. Gita 3.34 warns that likes and dislikes in the senses must not be allowed to rule us.
The practical path starts small. Gita 3.41 says to begin with mastering the senses, since small acts of self-control build strength for larger tests. Gita 3.7 says to let the mind steer the senses and then act with detachment, and Gita 2.61 says control is steadiest when the mind rests on something higher. Gita 6.36 promises that persistent, properly directed effort can succeed. If a habit feels compulsive or harmful, please speak with a doctor or counsellor.