Here’s two option for this story:
1) MC train until she reaches 20 years old, enough to defeat the f*cking bastard, and kill him on the spot.
2) MC kills herself right here and now.
Preferably the first option, BUT if she even dared to fall in love with the son of a b*tch, I will personally jump into this freaking world and kill them both. Reading just this one chapter is enough to make my blood boil.