What’s the motivation for people’s criticism?  Is it to build up or tear down?  Constructive criticism is used to help correct someone’s focus and get them on the right path, to move them forward and build them up. 

Many will give subjective or destructive criticism based on what they think and feel, not what they know about the person and situation.  That is when you can come across in a negative and hurtful way.  Sometimes, the intent to be hurtful is there, but sometimes it may just come out the wrong way.   So be mindful to prioritize your thoughts and feelings and know the situation before offering criticism.