How fake are your relatives?

I used to stay in a joint family and my father used to take care of every expense of our house. My grandparents and my family and my uncle's family used to stay together and most of my father's income was spent in facilitating my Uncle's wife and her needs. Imagine my Dad paying for my Uncle's Wife(Chachi's) mother's waist belt worth 32K because apparently some lady in her locality told her that it helps one reduce the pain. My mom noticed this and later we moved from a single home to 3 different flats in a society, my grandfather owned one, my dad owned one and one owned by my mother(self earned before people make allegations). My Chacha wanted to stay in a house we own rent free and later manipulated everyone and eventually my grandparents moved to our house and my Uncle's family moved to the house owned by my grandfather. My Uncle earns around 30-40K per month but spends 2-3 times of his salary. They spend more than 10K per person on their diet, similar amount on consulting dietitians and Gyms, Yoga and other stuff because "Doctor" has advised them to eat all that for their health. No doctor advises anyone to eat aesthetic Avocado Toast everyday. They got 2 scooties and 1 bike, funded by my Dad and my grandfather. My grandfather even bought them a flat in a remote locality after they emotionally manipulated them. Paying their grocery bills, their car EMIs and soo, how shameless can a person be? Asking my Dad and my Grandfather for money for literally everything but gifts his Mother in Law a TV worth 70K all from our money. Manipulated our family to pay them extra because my Chachi's mom moved in with them after both her sons threw her out of their home. Going to 5star restaurants, spending more than 5-6K per dinner, buying gifts more than 10-20K for each of their friend's birthday. Their daughter has also followed this path, my Uncle asked my Grandfather for 60K because of some health emergency for his wife and after 1 week, his daughter went to Goa on a trip and is staying in 5 star ITC and Taj properties everyday. He asked my Dad for 1.5L to pay his daughter's fees and the next day she bought an iPhone worth 1.2L . Dude literally they're sponging off our money with the help of emotional blackmail. Eyeing every rupee anyone in our family earns. Having huge desires isn't wrong but one should spend as per their earnings.. What should I do in this situation? Have you also faced something similar in your family?