In Of Mice and Men, who causes the suffering?

in of mice and men almost all characters suffer in some way.For example George: He had promised lennies grandma that he would take care of him and now to keep the promise; he has to keep up with his childish behaviour and stupidity which is clearly slowly driving him insane:in this case the suffering was caused by Lenny.

Lennie also suffers in a few ways, he suffers financially, mentally and socially. Since Lennie is not the smartest guy, it is very difficult for him to find work. He has a hard time listening and he has a very hard time making good decisions and therefore not many people want to hire him but George is there to help him find work but even though Lennie is able to find work he still is very low on cash because the ranch doesn't pay him what he deserves and what he does get paid is only just enough to live off.

Explanation:

idk tbh because i'm just getting points.

what is the context here? we need to know what story you're talking about : )