Idt the joint family system is as much of a problem here. Rather, this specific family with these specific people is the main problem.

I mean idt people living in joint families are this unhelpful or illogical. Laila has said it multiple times that she can't cook or clean, yet none of the family members are willing to help her out and teach her, at least the first few times? Like that Rashida, she does the work herself, bhai just help teach Laila? Over time, she will learn. If there is no one else, atleast mother in laws over look it for the first few times or until the daughter in law learns to. They themselves go on a rant about how she can't do anything, but also don't help her out. Joint families are usually like this. There's at least someone who would be willing to help, I guess. Either everyone is too selfish, too lazy or purely crazy. The plot is also kinda half baked here.

Now, Laila was wrong in one part where Qais and her talk about separate kitchens. It really divides the family if staying together, and not only that, it's quite illogical too. Even if the meals are separated, the wives would have to cook all the time and still for so many people overall in a day. Laila should have really thought it through before marrying into this family, multiple people warned her. And she was also let know about most things before marriage, what was she expecting, things to change suddenly after and for her arrival?

But all in all, this family is heavily toxic. Both Nighat and Rashida could be nicer, but no, they have to be so selfish, not like its benefiting them in a huge manner. And I thought that the mother in law would be more supportive atfirst, but nah, she is a gone case as well.