Grandparents are very important, from the first moment of learning a grandchild will be entering the family until they start their journey into adulthood. Grandparents can be a source of support, comfort, and a shoulder to lean on. But it looks like that is not what is happening within your family system. This must be very sad for you. I encourage you to make an appointment with a counselor so you can process and understand your thoughts and emotions. Relationships can be repaired.