I want to make a gofundme to fund a vasectomy for my idiot cousin who keeps having kids
Why don't you want your cousin to not have any more kids? Is he not responsible?
No, he keeps having them and doesn't plan to stop.
Having too many children is definitely a problem. Some people don't  think of the consequences of their actions when they are having children and if they cannot take care of them responsibly, should feel the repercussions of their recklessness.
You don't get it. I don't want him to have any children, this way he doesn't make everyone else's lives miserable.
You should let your cousin know how reckless they are behaving and show them how having too much kids will come back to bite them. Let his partner know as well and see if they are on board with having so many children.