Ya know, very rarely does responding to negative comments online actually benefit someone in any way. Sometimes leaving their negative comments up from brothers to see without responding or fueling anything further is the correct move, even though I understand the frustration. Some people crave a response and nothing that you say can improve the situation, but ignoring them can be the most impactful thing you can respond with. Sorry you're having a rough time with it and I totally get the feeling! Try to not let it get to you and forget them the best you can.