But we need to be thankful for honesty in other people. I once heard someone say, "Only two people will tell you the truth about yourself" someone who is angry with you & someone who loves you very much." God uses both types in our lives, but He especially uses the honesty of friends & loved ones.
When someone can, in love, honesty show you how you can improve, the results will be so much more valuable than empty, ego-stroking compliments. It's this kind of relationship that the Bible describes as 'iron sharpening iron.'
I urge you to be thankful for people who tell you the truth about yourself, even if it's not what you want to hear.
When you hear the truth, especially something you weren't aware of, you can change. Ultimately, their honesty will make you a better person.