I agree. The serial has distorted the reason behind sita's oath of going back into earth. SKR sita refuses to go back because she does not want to go back to ayodhya where her character was stained by the questions regarding her purity. Before sita's marriage, there was a conversation between ram and sita abt woman's respect and dignity. To me it makes sense that this sita would not go back to the same society who disrespected her. According to sita, people turned a blind eye to the fact that she was a victim and they chose to blame the victim for what happened instead of blaming ravan and there are lot of common women in genreal who are abandoned and punished like her and those women don't even know what their crime was coz everyone refuses to even listen to her side of story or her pain. So if she goes back right now to ayodhya, it would be an insult and injustice to those women.
From my pov, she is a queen and she is self-assured and has lot of self-respect. So her making this decision has nothing to do with punishing anyone or hating anyone.she is a woman and people hurt her self-respect and pointed at her character. Today thsee people are asking her to come back but if she has to live with the possibility that it could happen again. Also she wanted to show society a mirror and also show how much they disrepect women and not consider her equal