Literally this, I feel like a lot of the readers forget that the original Sylvia wasn’t the best and harassed her sister often.
Agree.
This one-sidedd view always happen yk. Readers often sympathize themselves with the MC more, and always get made at the other person who "made them bad". But readers also often forget that sometimes, whether the MC do it purposefully or not, they maybe hurt the other person too, and that made a distance in their relationship. Also sometimes the other character have their own reasoning or concern too (not that I'm saying it's always acceptable.)
The one understandable are those who tried their best to make the MC happy but failed due to miscommunication (which means the fault goes both ways)
the one unacceptable no matter what is like, Soveshit from Remarried Empress >:(
I get the whole thing with the "Oh now that your child is useful you are paying attention"
It kinda makes me upset too to a certain degree.
But I think we should focus more on how "when you act nice, nice things will come your way." Even if the original Sylvia wasn't this great, but she already had a nice sister, if she were to be nice to her sister too, she wouldn't have been abandoned? I mean she won't be the main star either, but she won't have to suffer.
I think the dad and brother didn't originally plan to make her suffer either. It's just she was starting to behave badly and what started out as simple punishment became abandonment.
Point is, be nice so others will be nice to you too (if not then you are allowed to kick their ass lol)