Strangely enough, gaining access to a large private porn tracker and abandoning tube sites, over 10 years ago, is what took me off the masturbator to gooner pipeline. The change was caused, essentially, by how I could search for porn.
On tube sites, I had to search for what I wanted to see, and ignore/overlook what I didn't while still being indirectly exposed to it; so, if I searched for "redhead", I got thousands of desirable results, intermingled with bullshit like trannies, gays, piss, fatties etc that still technically involved what I searched for. The torrent tracker allowed me to search via elimination; so, instead of looking for what I wanted, I simply filtered out what I didn't want to see in any way. I had a blacklist consisting of a few dozen tags, like the aforementioned trans/gay/scat, and a "warning" list for things like fake tits, bimbos, and interracial, which didn't hide the offending torrents, but highlighted the offending tag so I could proceed with caution.
Little by little, by not pushing myself into niche content to squeeze out as much dopamine as possible per wank session, my tastes renormalized, and the fetishes/weird tastes gradually vanished. I can't guarantee it'll work with everyone, but the change in how one searches for porn can definitely help some people back to normalcy.