It's always sad when people use religion to justify being horrible people, or get turned into horrible people by religion...chicken/egg. The good news is you see past it and can be a better person than your parents are able to be.
One of the best ways to feel better about ourselves and our situation in life is to practice what most religions preach : Be kind and help other people (or animals if you prefer). There are lots of very unfortunate creatures in this world and anything you can do to make their day a little brighter will bring that light into your life as well.
You might consider looking for volunteer opportunities, adopting a stray or shelter animal, helping the little old lady across the street prune her rose bushes, anything at all, no matter how big or small. Find every and any opportunity you can to spread happiness and you will be happier yourself.
You might also consider starting a garden. Pretty flowers are always nice to have around, and the physical activity is good for you and can help take your mind off of things, even for just a few minutes. We all need a break from ourselves from time to time.
Happy birthday treebird. Be well