Oh ... Kay
You are 34 living with your parents, have no job, make stupid excuses (fat), put your responsibilities on them (cats) and then act exceedingly ungrateful if they make a mistake. Plus you seem extremely paranoid and hostile. In most circumstances outside of high school most people don't randomly insult others to their face. Either you are majorly misinterpreting their words or are provoking it somehow. People overall are good. Give them a chance to be that way and don't go around just expecting the worst.
I'm not at all surprised your family see you as less than intelligent individual who can't think for themselves.
Stand on your own two feet and earn their respect if you want it. Stop complaining, making excuses and start doing. This world owes you absolutely nothing. Get out there and earn what it is you want.