Misery loves company, and so on. That's the reason why people love this book. They see in Stoner a reflection of themselves; it's all because we are in this era where people have severely low self-esteem, everyone deep down considers themselves to be losers, everyone has suicidal thoughts, etc. That's what this novel is: pornography for losers. We see a similar phenomenon with The Stranger and Notes From Underground.
Stoner is nothing more than a worm. For one who is in such a position must recognize that there are only two options: 1. Realize that you have nothing to lose and strive for something greater, or 2. End your miserable existence. Because a life like that isn't worth living, if you lack the guts to improve your position you must at least have the courage to end the suffering. When the life of a dog becomes too pitiful we go to the vet and put it down.

>Realize that you have nothing to lose and strive for something greater >For one, how he completely abandons his parents. They toil the earth day in and out, finally manage to scrap some money to send Stoner to school, and what does he do? Leaves them to rot in the fields. Which one is it, strive for a noble pursuit, or resign as a slave to the wants and desires of other people? It seems like in your attempt to have a le edgy rape opinion, you've run yourself into a contradiction. Why is Stoner more indebted to his peasant family but not his wife? He abused both, but you only celebrate the rape...
I wouldn't have insulted Stoner if he used his triumph (abandoning his parents) for something positive. Instead he remains rotting. Nothing changed. He never seized control of his life, instead he was content with mediocrity. Thus, what is tragic is that he betrayed his parents for nothing. There's no contradiction here.
Mediocrity defined by who? If judged by the standards of common people, then sure, Stoner was a failure, but you shouldn't listen to common people. And I really mean 'common' in the pejorative sense— if you're worth anything, you don't slavishly follow the direction given to you. Stoner found something that made him happy and desired no more. He was content, and if he left his happy station to pursue something worth higher stock to society, then he would be a cuck.
Do you think Stoner's life wasn't pitiful?
I do not think Stoner's life was pitiful.