Hey dude, I just wanted to send a message after seeing people being a huge downer on your art and ocs.
I just wanted to tell you that I was drawing stuff like you do when I first joined deviantart! Keep at your work and just block people who want nothing more than to bully you instead of giving you actual constructive critisism.
Don't let them stop you from drawing! Years later you'll look back on this laughing at how much some people really like wasting time making others feel bad.
Your sonic ocs are great, and as long as you listen to REAL critisism that isn't shoved down your throat, you'll improve greatly and become an amazing artist.