I disagree with you assessment. How can Roli be blamed infact she is a bigger victim. She is going with the evidence provided which points to Simar as the culprit but look at Simar what did she do ...judged her sister not once but twice, once on the heater issue and once by slappin her over the black pepper issue without any cause. So its that easy haan slap someone & then apologise, simar slapped Roli in front of her inlaws and her husband and Roli will be stupid to forgive her for that.
I know you are a Premar fan but try & look at it from the other side. Roli has done so much for Simar, she should have been a student enjoying her teenage but because of Simar's desire to dance Roli had to pay the price and marry Prem at such a young age. Usme bhi she never claimed any rights over Prem and moved out of the way so that Simar Prem could be together.
How can you say that Roli did not show any interest in going to college.. Both the sisters were shown to be extremely good in their studies and Roli has been potrayed as a good student. Bottom line it all started with Simar's desire to dance which ruined Roli's life otherwise Roli would have been a happy go lucky student without facing all the difficulties she is right now.
Remember all the evidence points to Simar right now which is why Roli is so unbelievably mad, she cannot believe a sister she has sacrificed so much for will do this to her...look into yourself and ask what would you do had you been in Roli's shoes.
Just my POV; no offence meant or intended.