My wife has gotten to fat and gross and disgusting for me to bear?

I spend 700 bucks a week on groccies and she eats it all right away. She lays in bed all day and farts poops and pees and burps all day while eating. I want to divorce her but people keep judging me saying I'm cruel. Everyday I just get more and more disgusted with her she even eats in the middle of sex she can't walk and she smells soooo bad cause she never bathes.