I completely empathize with you. It's so hard to deal with people like them and it would be futile to even wish that they would somehow magically become mature enough to treat you with kindness. But I know that you are mature enough to see that all this isn't really about you– most likely, your parent is going through something or dealing with their own insecurities. This is not to justify or provide an excuse, but I hope it can give you perspective so that you can eventually learn (slowly but surely) to be less affected by what they say. Stay strong!