According to this article, there are four reasons that might cause you to grow uncomfortable when someone compliments you, leading you to deflect. 

1.  Have Low Self Esteem

2. Your Self-Image Doesn't Line Up

3. You're Uncomfortable with Big Expectations

4. You Want to be Humble

You may agree or disagree with these four reasons and you may have a few more that you might add to the list if you yourself have a tendency to deflect compliments. 

The important question for you, if you are someone who deflects when given a compliment is, what are you gaining from deflecting?

and

What is happening to the person giving the compliment when you deflect?

Today's episode will promote thoughtful discussion and discovery for you and the people in your world surrounding the subject of compliments.