Watch if you want an extremely slow-burn drama about revenge. There's almost no back story on how she plans her revenge but rather more about how the relationship of the characters develops.

My mistake was watching the entirety of season 1 and expecting it to at least progress halfway before season 2. The first few episodes were good and provided sufficient backstory within a timely manner which didn't feel rushed. However, the show slowed down halfway and focused on the dynamics of the characters within adulthood. The seething felt a bit dragged as the vengeful emotions were already portrayed early in the drama so it was a letdown that there was not much progress with her revenge plot this season. There are many plot holes that arrived early in the season and are still to be filled in season 2.

I might drop it in season 2 if the first few episodes do not progress the plot. Do not watch if you're looking for a thriller.