Antonyms for the phrase "sets store by" can include terms like disregard, ignore, neglect, despise, and undervalue. These words indicate a lack of consideration or importance placed on something, whether it be an object, idea, or person. Neglecting or ignoring what one sets store by can lead to detrimental consequences, including damage to relationships, lowered self-esteem, and missed opportunities. While it is important to prioritize and value what is meaningful to us, it is also important to recognize the value in other people's beliefs and experiences, and to be open to learning and growth.