Positive Criticism is an oxymoron.
Criticism is always negative.
A positive appraisal is called praise.
When a critique looks for improvement, it is focusing on the negative aspects that are potential areas of positive improvement.
A positive critique is called a review.
A positive review expresses praise and encouragement.
A negative review is full of criticism.
Criticism is negative because it is a toleration.
Criticism is never acceptable.
Acceptable feedback is never seen as criticism.
Whether feedback is seen as negative criticism or positive encouragement is determined by the perspective of the receiver, not the giver.
No matter how much I believe my criticism to be positive, it is the belief of the receiver of my criticism that determines its polarity.
Criticism motivates with fear. It is not empowered.