The established ruling of the major contemporary scholars and fatwa bodies (such as the Permanent Committee, Ibn Baz, and Ibn Uthaymin) is that cigarette smoking is harām, not merely disliked. Although tobacco is not named in the texts, it falls under clear principles: Allah forbids destroying oneself and harming the body — "And do not throw yourselves into destruction" (2:195) and "And do not kill yourselves" (4:29) — and its proven harm and foul nature place it among the khabāʾith (impure/harmful things) that the Prophet ﷺ came to prohibit (7:157). It also involves wasting wealth on something that damages health and offends others with its smoke, so a Muslim should quit and seek help to do so.
Informational, not a personal fatwa. Consult a qualified scholar for rulings on your situation.