How was it not on her to be a gambling addict and a thief just cause her boyfriend was also a gambling addict and a thief? The blame for a crime doesn't get divided equally across all accomplices.
It's because MC was a dense-character which Tania should've been his, but because he was THAT kind of character, YUP, MC is partly (welp, mostly) at fault for not recognising her deep desires/feelings for him.
How was it not on her to be a gambling addict and a thief just cause her boyfriend was also a gambling addict and a thief? The blame for a crime doesn't get divided equally across all accomplices.