Giving and receiving criticism is a challenge. It brings up emotions that disrupt relationships and hinder personal improvement.
Part of what makes it so challenging is the way the word is defined and the bias that definition creates. Most dictionaries initially define criticism as an expression of disapproval. Synonyms are attack, censure, condemnation, and disapproval.
When we go a bit deeper we find that criticism can be both positive, giving praise, and negative, pointing out flaws. There are synonyms such as analysis, evaluation, and assessment.
The point is that whether criticism is negative or whether it is positive it needs to be integrated into your work on yourself.