A lengthy write up, but here's my take...
I think the show is about the conditioning of girls to believe that they have to be a certain way to 'achieve' a perfect groom. When we are in the 21st century and talk of shedding age-old regressive ideas, society at large still panders to the notion of "marriage or nothing" for girls- but under the garb of modernity. By grooming and transforming yourself
to be a bride, you are indulging in patriarchy while letting your own self fade away for a prospective groom- which is not 'modern' thinking by any means.
Getting groomed in an institute should be a personal choice. Not a compulsion as dictated by society to 'get married'. Marriage should be between individuals who are compatible. Enough said.
So going by this concept, Meera is shown to be someone who desires to be accepted as she is. But due to the above said conditioning of society, she is at constant loggerheads with her family over this matter. And this is true. Many girls have principles when it comes to their marriage (with respect to the amount spent, the dowry aspect, career etc.) but eventually give those up due to societal and parental pressures, settling down for something less. Meera also, has to swallow the humble pie and get herself enrolled, for her family. And this, my dear, is the sad reality.
So when Meera doesn't speak up against Sumer or his mom on their faces, she's only being starkly real. I've myself had problems with this part of her character but a more refined view would tell you that, however fierce, girls have limited decision making powers in India. She will not and cannot go and declare about the 'house' or the 'ring' to the in laws. That's for the 'elders' to do.This is how middle class households in India function. Take it or leave it.
What she can definitely do is- take her partner into confidence. She tries that. So when Sumer says he has no problems, she is naive enough to believe him. That's it!
Yes, she can definitely talk to family about their chronic lying. Agree to that. She had tried previously with the house thing and has since left it at that.
And yes... girl and boy change after marriage. When they are in love with each other. Being a custom designed bakery cake for marriage to happen is definitely not changing in/for love.😊
As far as Sumer is concerned- Yes, he can have expectations from his would-be. Just like how she has. But Sumer doesn't even try to talk about his expectations. He either talks sweet when she is willing to discuss important matters related to her or he occasionally dictates what he wants (dress, high tea) without considering her opinions on those matters. He doesn't even check whether she's comfortable or aware. He taunts her when it's all over and closes the matter there.
Still she's trying... and that is frustrating her. She is blaming institutes like Soni Kudi and the outlook of society for why she couldn't stay on her principles. The frustration resulted in yesterday's chaos.