"I have some feedback for you!"
"Okay! What is it?"
"Your work is a steaming pile of crap."
"..."
"And I can find comparable work anywhere else."
"Okay... but WHY and HOW is it a steaming pile of crap?"
"I can read stuff like this anywhere."
"Okay, but WHY?!!"
Or very helpful!
"I have some feedback for you!"
"Okay! What is it?"
"Your work is a steaming pile of crap."
"..."
"And I can find comparable work anywhere else."
"Okay... but WHY and HOW is it a steaming pile of crap?"
"I can read stuff like this anywhere."
"Okay, but WHY?!!"
I suggest just ignoring these types of comments. Ok, they hurt, but you will never have a situation when your work will please everyone.
Just continue!