toxic/abusive relationship

could be either cdrama/jdrama/kdrama, with a violent ml

While I agree with the commenter above I especially tried to pick some out where there reallyiq abuse or toxic relationships are going on.

Somebody - he is a murderer and sometimes out to kill her
World of the Married - both are absolutely toxic
Penthouse: War in Life - everyone is toxic
Gold Panning - this one is more tricky. you will either absolutely love it or drop it since it is very serious. There is a lot of toxicity going on but it is following a very serious theme, very deep and definitely not the typical asian drama.
Gannibal - welp the title explains it pretty much
Graceful Friends - here we have friends but there are some secret and relationships that are quite toxic. There is also a story connected to one of the wives and that is quite....welp
Kidnapping Game - toxic relationship even when it is sometimes quite beautiful to watch
Whispers - they are ones worst enemy
Secret - she is the one who is responsible for his gf's death
Burning Ice - this one starts out fine but something happens and a couple is forced into a very hard situation and changes not for the better. It is really good but the relationship of that couple is quite hard. 

Circle of Love (2023)

Have a Crush on You (2023)

Frankly, you should watch Thai Dramas (Lakorns). That's basically 70% of their dramas...

I'll give you two VERY toxic relationships in Lakorns. 

Wong Wien Hua Jai (2021) Well. He lies, kidnaps, locks up FL and the list goes on.  Very hard to say something that ML didn't do.  But don't worry: everyone else is also toxic here. This one traumatized me. 

Kleun Cheewit (2017) 

 Nusrat Afifa:

Most of the thai drama.. 

1. Kleun cheewit
2. Hua Jai Sila
3. Ngao Asoke
4. Barb Rak Ta Lay Fun
5. Behind the revenge 
6. Buang rak salak kaen
7. Ching ruk rissaya
8. Fai lang fai
9. Fai chin sua
10. Game payabhat
11. La ong dao
12. Leh ratree
13. Lying heart
14. Massaya
15. Nakark kaew
16. Sud sai pan
17. Sawan biang.
18. Once upon a time in my heart
19. Behind your smile (taiwanese) 
20. Cuo diang  yuan yang (chinese)
21. Cruel Romance (chinese) 
22. Lady and liar (chinese) 
23. Sealed with a kiss (chinese) 
24. Maid revenge (Chinese) 
25. Koi to dangan (japanese) 
26. Watashitachi wa douka shiteiru (japanese) 
27. Secret (korean)
28. Giant (2nd lead couple)  (korean)

goddamn