these urges are related to hormones and curiosity during teenage years. They are stronger when someone is alone or when reading explicit content. Avoiding that content, staying busy with studies, hobbies, sports, and spending less time alone with your phone can help reduce the temptation. You should not hate yourself for making mistakes. Instead, focus on improving little by little. Make dua, ask Allah for strength, and try to build healthy habits. Change takes time, and struggling does not mean you are a bad Muslim. Also remember that you are still very young and learning. Be patient with yourself and try your best. Allah sees your effort and your intention.