Issues like this are related to karma and are typically fated. You can see this by viewing your natal chart. Check the third house, which rules the house of siblings, and the fourth house, which is the house of family, and look for any bad aspects, degrees, or if any planets are debilitated or in fall in signs there.
There can be harsh lessons that come with an upbringing like this, but it is not all bad. This circumstance you are in will force you to find love within yourself first before trying to receive love from others. Once you are not dependent on their love, and have enough self-love, then this won't be such a problem, and you can still try to be on good terms with them without being hurt by this. Also, if things really never work out with your family and you never receive care from them, you can try to start a family of your own and give them all the care you wanted in your old family.