How can one get rid of watching pornography, especially with the repeated return to it despite multiple attempts at repentance and perseverance in prayer?

Obedience to Allah, remembrance (dhikr), and recitation of the Quran bring about awe (khashyah). You must also cut off the devil's steps from their very beginning. Ibn al-Qayyim recommends the necessity of repelling evil thoughts and ideas before they turn into desires, firm intentions, actions, and habits. He mentioned that idleness and solitude are among the main reasons for viewing forbidden things, so one must beware of isolation and remember Allah's constant watchfulness, as stated in His words: (They seek to hide from people and do not seek to hide from Allah; and He is with them) and (Nor do you do any deed except that We are witnesses over you).

Death comes suddenly, so fear a bad ending, and make use of the blessings of leisure and health before you are questioned about them. A Muslim youth should utilize his time in memorizing the Quran and Hadith, seeking Islamic knowledge, visiting scholars and righteous people, reading Islamic magazines, listening to lectures, participating in da'wah activities, and associating with righteous youth who adhere firmly to the religion of Allah.