Been fighting for 11 years now, its still a struggle..

I'm 18 at the moment. Yes i got into a porn addiction at the age of 7, but i want some advice on how to fight this addiction. Most days just feels like a battle I'm never gonna win. I just need somewhere to vent where i feel I'm safe venting. I've seen or hear about almost any sort of way to quit lust, the one that has worked the best is to be as busy as i can or staying off the internet. I still get the urges and i know it's normal to still get urges once your out for 2 months or so, it just feels like the amount of pent up lust grows, i feel trapped and I've sort of accepted that I'll never be able to truly escape lust. I completely blame myself for it, and i don't want to come here and just use depression and ADHD as a crutch for why it's so difficult for me, but i do feel like it's sort of a aspect i need to consider. The thing that makes it feel super bad tho is that I'm a Christian and I keep going on with the knowledge that i shouldn't, i overall feel like it has had a domino affect on my life so far. The way i see women, the way it affects my mood, my focus and my productivity. I feel like a failure.