Lol. Lmao even. Feedism fics are some of the best fanfic I've read. Feedism is actually the first example of online fanfic I discovered. There are some genuinely excellent original work feedism fics out there that could be full length novels. I'm not sure what you mean by "badly written"- bad grammar, bad characterization, bad storytelling, or a bad representation of healthy communication and negotiation between characters. I've read excellent feedism where it was entirely devoid of any mention of feedism as a known fetish, where it's just two freaks indulging each other. Nonconsensually even. In messy, unrealistic ways. I've read great feedism that is hyper aware of kink meta and brings this narrative into the story. I think you can write good (I mean good as well-characterized, compelling, erotic, grammatically correct) feedism fic without being familiar with feedism. Good kink negotiation isn't necessary for a good story. If you only want good kink negotiation, good for you! I can see how that would be a little difficult to find. I would find a few examples of well-written fics that you like, go to the author's page, and read their bookmarks. Read the bookmarks of the people who have commented (positively) on their works. That's kind of a diy algorithm. There's also tutorials out there to get the most out of your additional tag filtering.