Here is a list of mangas that are toxic, butttttt I actually enjoy. You can find a mix of BL & shoujo/Josei romance mangas.
check out my other lists if you’re interested in similar ones:
Toxic/trash mangas that I actually don’t like:
https://www.mangago.me/home/mangalist/459415/Angsty love/confinement:
https://www.mangago.me/home/mangalist/2275892/Crazy/psychotic/sociopathic male (sometimes female) characters:
https://www.mangago.me/home/mangalist/310375/ 
