Enemies-to-Lovers Recs discussion

Does anyone by any chance have any book recs for enemies to lovers where they actually are enemies. Like they DESPISE each other. Try killing each other like proper hatred. Not like those booktok books that people recommend claiming to be enemies to lovers. Very much slowburn. The only book Ive ever read like that was probably Cruel prince and that's it. The others I wouldn't even consider them enemies to begin with.

The Billionaire's vows of revenge : A ruthless vow. A broken bride. A dangerous love.