Swasthi, however much I try to see Rashi as being 'good at heart' just wrongly influenced, I cannot.
IMHO, Rashi always knew that Gopi was a better person than her. That formed the basis of her jealousy and her hate towards Gopi. But Rashi is also smart enough to identify that Gopi is useful to her.
In her own house before Marriage, Rashi and Urmi always managed to make sure that any of Gopi's goodness went unappreciated or worse scorned as foolishness But after marriage, if Rashi had not known about Gopi's goodness and her sincerity, she would never have tried to ruin Gopi's work at all times.
Even now, a small praise to Gopi hurts Rashi only because Rashi knows that she can never match Gopi.
The fact that no one expects her to be Gopi is lost on her because unknowingly Rashi wants to be Gopi's equal. Her "these grapes are sour" attitude when it comes to Gopi is a proof of that fact.
Rashi has been really lucky to get inlaws who like her as who she is.. childish, pampered, selfish and lazy.
All they want her to do is be truthful and help around in the family. The acute jealousy of wanting what Gopi has, both real and imaginative, drives Rashi to do what she does. She wants to be Gopi without actually being one. She wants to be praised without putting an effort. That is what is pulling her down.
And when she finds herself not in the same range as Gopi, she tries to reach there by deceit, lying, tantrums and manipulations.😭
Rashi's bond with Gopi is one of love-hate.. Rashi needs Gopi. She knows she cannot survive in MM without Gopi because she is afraid that the original Rashi who Gopi knows is not someone others in MM will like. She has pretended so long that to keep up her pretense, she needs Gopi. Hence her help when Gopi is about to die.
As long as Gopi is there, Rashi knows that she can escape and not change.
Just my PoV😊