There is a very thin line between critiquing and criticizing. On one hand, when we critique something, we are noticing what it is we do not want to choose for our own life experience. The end result should be that we live and let live without condemnation.
On the other hand, when we criticize, we are tearing down another person. There is judgment and condemnation.
One day, we will come to understand that everyone's choices helps us all to experience it all. It is as though we are a part of one body. Some of us are eye cells, others are ear cells, heart cells, brain cells and so on.
So, when we criticize and speak negatively about another, we are criticizing ourselves and the God who made us all and who loves us all.
Sometimes, people point out flaws in the name of humor (do you notice how cruel comic jokes can be?) They don't really mean the things they say; they'll do and say anything for a laugh. It's still not nice though.