"You need to love yourself" is the world's prescription for those who are plagued with a sense of worthlessness.  As with much deception, the lies represented in advertisements are not the polar opposite of the Truth; rather, they are distortions of the Truth.  

According to God's Word, the Truth is that we were created in the image of God, that He loves us, and that we are precious to Him.  However, we do not bestow that worth on ourselves.  Nor do we experience the fullness of God's love by telling ourselves how lovable we are. 

To the contrary,  Jesus taught that it is in losing our lives that we find our lives.  The message of self-love put people on a lonely, one-way path to misery.

How often have we heard someone say, "I've never liked myself," or "She just can't love herself"?  According to the Scripture, the Truth is that we do love ourselves --immensely.  When Jesus tells us to love our neighbors as ourselves, the point is not that we need to  learn to love ourselves so that we can love others.  Jesus is saying we need to give others the same attention and care we naturally give ourselves.  

The fact is, we do not hate ourselves, nor do we need to learn to love ourselves.  We need to learn to deny ourselves, so we can do that which comes naturally - to truly love God and others.  Our problem isn't so much a "poor self-image" as it is a "poor God-image".