any bls where the mc vows to kill a guy for ruining his life/slaughtering his family and actually goes through with it? so tired of weak willed mcs who fall in love with the source of all their problems. it’d be nice if the story let the guy think mc was in love with him only for mc to kill him,,,
Rebirth of Poisoned Empress After Being Forced to Marry the Evil Star General - but revenge is already mostly done at start of novel, however an important figure responsible for MC's misfortune will show up later in novel.
A Hundred Ways To Kill A Hearthrob this is quick transmigration but first arc historical and I think exactly what you want