Welcome back ladies and gentlemen of the internet. Our families are supposed to be there for us through thick or thin, for the good and bad times, and when we need them most. Having parents you can't rely on creates a hostile situation, and it leaves a child wondering who to turn to. They could end up in unhealthy relationships due to this neglect, and it's really up to the parents to get them out of touch situations. No one should feel like their family is mocking or jeering at them. But if one does, it's appropriate to cut out anyone from your life who makes you feel that bad.
This brings us to the Reddit thread. In this story, the original poster (OP) is a young man whose family has done exactly this. OP was diagnosed with ADHD when he was a boy, but instead of adhering to his needs, his family used it as a weapon against him, mocking him about his slowness, or ability to remember things. Well, they got what they deserve in the end.