Words don't just form sentences they show emotions. Some of those words just act like the bow and arrow going straight tearing up someone's heart. Sometimes these words help the other realize the difference between the good and the evil , the right and the wrong.
Words are the representatives to of your emotions. Talking about "emotions" it's simply a seven letter word like 'rainbow' full of different light and dark colours.
The darker part of the emotions scares away the happiness and brings life to sleep. Take anger , envy or hatred for example; these words simply keep killing the happy souls and even make hate oneself, hate the world and by the end one would hate every single luminous creature on the earth..
On the other hand the positive emotions like love , awe and care not just bring a smile on the faces but it brightens up the soul as well. It's the best feeling you'll ever go through..
Therefore remember there are 100s and 1000s of ways to communicate includingthe wast variety of languages available.. choose the one that hurts the least.
Even if you believe you're trying to be honest, then go ahead for the "constructive criticism" and not for the "projected criticism". Compete with others in a healthy manner.