In the West you will not hear about mothers-in-law abusing, harrasing and torturing their daughters-in-law. You will not hear about fathers-in-law lusting after their daughters-in-law and often raping them. You will not hear sons getting brainwashed by their mothers who can’t stop complaining that their daughter-in-law doesn’t serve her properly or did not make tea when she asked her to.
When two or more families live together it becomes the perfect place for comparisons to occur and jealousy to take birth. It is obvious that not everyone will be in the same income bracket and therefore lifestyles will be very different.
We are a developing country and until the evil custom of joint families is eradicated from our society be assured we will always be developing.