Improving self control?

I've been doing NoFap for 10 months now, and have made some great progress in that time, but it seems like I still struggle massively with self control. During my last streak I genuinely thought I'd hit the PMO addiction on the head only for me to go back to consuming extreme porn as soon as I allowed even a few days worth of fantasy into my head. This has made me think that perhaps simple abstinence isn't enough to help me, that simply avoiding any and all sexual situations just represses the addiction as opposed to cure it. I put blockers on my PC, I've outright stopped using any device that doesnt support web blockers, I've stopped browsing any and all softcore content I may have looked at without thinking in the past. I avoid sexual thoughts and fantasy, I do all I can realistically think to do. Like I said I've objectively made progress on other areas but at the same time I feel like I'm not much closer to fixing my main problem than I was back in January. Does anyone have any advice on this? It would be greatly appreciated!

 

I think it probably is something to do with stress/anxiety but I'm still not 100% certain where those emotions come from to begin with, in the past few weeks I've started a more introspective approach and it is working, I'm just not yet at a point where I feel like I can even entertain sexuality without it leading to relapse. This bothers me because my intention with NoFap was always to cut out porn and to stop using it as a crutch, and going full hard mode feels like I'm repressing myself but at the same time its the only thing that works.