Responses
https://www.mangago.me/read-manga/a_silent_garden/
idk if you’ve read this one but this fits what you want kinda (it’s her brother in law)
also the mother in law is a villainous too
The way to protect the female lead's older brother has a sketch ass dad too, but her brothers/cousins are arguably worse and just as disgusting (except i may have a weird soft spot for her younger bro even though i want to fight him half the time).
https://www.mangago.me/read-manga/the_way_to_protect_the_female_lead_s_older_brother/
Can someone recommend some like The Villainess is a Marionette..with brother as villanous one cuz its ALWAYS THE DADS....orrr Any other? except for the famous ones? just should be isekai