
I think those may fit your description:
1.
https://www.mangago.zone/read-manga/a_guilty_victim_player_s_hustle_play/
Bing read it just today it's so good both characters are just asshole but with human sides to them and reason why are they like that. At first they are kinda mean to eachother (esp the seme). It is shounen ai so there is no smut and def no rape scenes even behinde the scenes at least now cz the story is still ongoing. But the whole phycological side of the story is so good. Highly recommend.
2.
https://www.mangago.zone/read-manga/cloud_1/
Best représentation of two mentally ill teenagers being in a relationship. Both are mutually toxic and they fight a lot from the start to the finish but dw there is no rape here nor smut cz this is also a shounen ai one (just be aware there is a noncon kiss by seme at season 1, but it doesn't go unnoticed and the author doesn't try to sugarcoat it or anything)
3.
https://www.mangago.zone/read-manga/a_trace_of_the_wonder/
Cant remember the story that honestly it's being so long since I have read it. But from what I remember the seme was such an asshole to the uke at the start and was trying to always manipulate him to get what he wants thou the did grow closer at the end and the seme def pay for being an asshole. Again this is shounen ai so no smut and definitely no rape
Hope this help you!!
Here’s something that could be a challenge. Does anyone have good-written BLs that’s toxic, or has someone who’s an asshole(both being assholes is perfectly acceptable too) WITHOUT any r*pe involved. I can only think of “ Hwang Young's Misery” and “ My Starry Sky”