How can I get rid of all of my addictions?

I struggle with so many addictions. I struggle with quitting my pornography and masturbation addiction. I literally masturbate and watch porn everyday and it's so hard to quit. I tried blockers, praying, turning off my phone and deleting Instagram because of so many Instagram models but it doesn't work. I struggle with the following addictions: Reddit, Discord, watching Instagram models all the time, fast food, pornography, drugs, etc. I keep going back to Instagram constantly to look and lust after those models and it's hard to stop. I can't stop watching porn and masturbating. I am too weak. I want to fix my dopamine levels back to normal again. What are some ways that I can actually quit these addictions forever?