Married Son Struggles with Demanding Parents and Secret Father

This pertains to my parents. I got married at the age of 30 about 18 years ago and have a dear and loving spouse who believed in contributing to our home and didn't wish to be a home maker. Since we were living in a joint family, my father wanted only us to spend for the full house without much/negligible contribution. My elder brother's spouse is from a well to do family and they started to live independently from the beginning of their marriage. In spite of running the total household expenses, we have from the beginning learnt to save and we planned many vacation trips, overseas and domestic alike. My mother could not and till date cannot appreciate the fact that only the 2 of us are holidaying and she wanted to be part of our holidays which we have vehemently denied as that was a me-time for both of us. She has held this sourness against us although this comes out in her discussion occasionally. In spite of living together and addressing all needs of my elderly parents, my mother is perpetually complaining about not doing enough. I have tried to leave home and separate out as 2-3 times the fight with her had gone out of bounds because of her behaving un-reasonably weird. At times she takes care of all of us and at times she speaks so bitter about me and my wife, it is had to understand if it was the same person. My father has been a quiet individual and he has no opinions on anyone and will not side with anyone, neither will he call out any wrongdoing & there is no point in talking to him as his only objective is to have a peaceful life and have 3 meals a day without caring about anyone else in the world. 9 years ago i was laid off and i was almost compelled to start a real estate business with my father, this work requires mental and physical dedication which i have put and established myself in a respectable stage. Since the beginning my father had wanted to only take the accounting bit of the business as his responsibility as he does not know anything else. He has not let me look at accounts ever and he kind of pays me a salary whatever he deems fit at the end of the month, he also retains a large chunk with him and pays mom to run the house from the business. Although he has no travel, not going out of home, and no friends, he still needs the money for which he has not described or spoken when asked, mom and i suspect he is funding another family at our expense but we are not sure, as he has maintained a secret life for his entire life. 6 months ago me and my wife purchased a home and shifted and even now his approach towards my family needs is nonchalant as he keeps the major pie of the business income regardless of not putting any effort or work. At one end there is my mother who has demands all the time, at the other end my father is almost stealing from me without any justification or clarification. Somehow both of us are living separate and managing a peaceful life with very little which remains after servicing all Emi's and plus we also manage to contribute little to my father in law for running his household. Both of us seem to be burned out as our close ones only think of us only when money is required. Sometimes i feel i should shut shop and do something else, i also upscaled myself by clearing MBA at the age of 45 during covid so that some employer may consider me worthy and in spite of applying to 450+ job openings no one considers my resume to be appropriate. My wife is employed in a senior managerial position with a mnc and both of us fear that in 10 years time we will have nothing left with us and no one to take care of ourselves. Its frustrating as there seems no path forward, can u suggest anything ?