I'm not doing well

I'm hanging by a thread, feeling useless because I can't fix or even help with all of the trouble my wife is having at home. Her mother is sick and can't be left alone but she treats everyone like shit. She feels the need to condemn EVERYTHING that anyone tries to do for her. She has been harping on my wife to lose weight for years, my wife was trying, she hired a medical weight loss clinic to help her and she was doing well but her mother sabotaged that because "those stupid people don't know what they are talking about". She wants my wife to get rid of our dog because "that dog takes up too much of your time" she thinks every single waking minute should be spent taking care of her. She is NOT a total invalid. Then throw in on top of it that MY mother is in the hospital, she is getting discharged tomorrow, she uses a wheelchair and needs a ride home and my wifes mother says she should find her own way home??? Meanwhile I'm stuck out here at work (truck driver) and I can't do a damn thing to help! My wife deserves a better man who can actually be around to help her with things. She doesn't deserve an idiot who could never keep a job that was more technical than holding onto a steering wheel! Suicide clauses suck!