Kuroko x Misaka is a pairing I've tried really hard to like, but I just can't. Kuroko is too much of a sexual predator and every story with her and Misaka devolves into some form of rape. This one, too. Taking advantage of a drug-addled girl and having your way with her when normally she would reject you; that's rape. This pairing is in stark contrast to Uiharu and Saten. Saten has a lot of sexual predator-like tenancies like Kuroko, but unlike Misaka, Uiharu is mostly depicted as being somewhat okay with going along with them. The way that pairing interacts with each other makes me hate the Kuroko x Misaka pairing even more.
Regardless of my love for yuri, Misaka will always be straight and involved with Touma in my headcanon. There's no healthy and enjoyable alternative that I can get behind for her.
The problem is that the anime played up those moments in order to make it a gag. In the actual novels Kuroko is far more mature about everything and you can feel her love for Misaka far more strongly than her lust. She comes on a bit strong, but not to the level of sexual predation. And in the end, Misaka's happiness is the most important thing for her.
And yeah, it's so disappointing that doujins that aren't centered aroudn rape are hard to find, but that doesn't mean that the pairing itself is bad. It just means that those rare gems, like A Certain Holy Night, and Judgment Princess, and several different fanfics, are all the more special.