Regarding irritating nature of wife

My wife's nature in so much irritating. She do not consider also son who is now in SSC. No one is able to convince her. Now a days after corona pandemic that is increased. I considered that when I suffers any problem, her irritating nature increases. We have completed near about 20 years married life, her irritating nature increased now this days. Now I am at 50 age, I am suffering for very loneliness and helplessness. But having responsibilities for my sun I bear all the things. But I felt now it is impossible to tackle her nature. Other hand, I have no option to take any action because of lower earnings. I feel very fear and in worry about me and my son. What is the way to threat her to prohibit her from irritation nature, without taking divorce for the sake of my son.