I don't have hate, but the most annoying comment I got was that they complained that it read right to left (which is how I've always done comics and books since I was a child) and it shouldn't go that way unless it was being translated from Japanese.
They also didn't like how it was done in a sketchbook and told me that the art was messy, crude, and I should use my ruler.
They did however, compliment me on my color schemes but everything else was negative.
The thing I learned from this experience is that they're just one person. One person's opinion does not equal the majority of the crowd's. Secondly, you do not have to listen to everybody's opinion because it will drain your happiness. Also, this person knew nothing about me or my art experience so I couldn't be too hard on myself.
I let the comment go (which was a really hard thing to do) and decided to move forward. After that, my art got significantly better in anatomy and more legible handwriting.
To this day, I still have no idea what that person was talking about. I no longer care what other people think, and by doing that I am able to focus on creating high quality art, characters, and a story. I have something I am proud of, and I know is good.
If your art and story sounds good to you, then you don't need anyone else to tell you so. As a good art friend once told me "true worth is not the words".