Fiction books that are purposely written to display toxic relationships/situations

Purposely written instead of the author trying to write a steamy romance or other dynamic in a positive light, when in actuality the relationship/situation is unhealthy and damaging

Books where the author KNOWS what's happening is a bad situation and writes the bad situation as such

(The only example of such a toxic situation is 'Drowning Instinct' by Ilsa J Bick.)