So, you just want to give it up? Nice.
Unfortunately for you, unless the other party agrees to allow you to discontinue your obligation, your kind of stuck to support the child you helped to create at least until the child is 18 ... possibly longer, depending on the dependency laws in your state and whether or not you are obligated to help support into college or not.
As frustrating as it might seem, this is not something you can just discontinue like a membership to the country club. You're stuck with it. So, you can either continue to fight and try to get some just visitation either through the courts or through kindness, or write it off as a long term debt you will have to pay.
- Carl