The definition of sacrifice is to surrender or give up, or permit injury or disadvantage to, for the sake of something else.
If we make regrets and complaints about a sacrifice that we've made for someone or something, then the entire act was in vain.
Jesus sacrificed his life for us, and we won't even sacrifice our time or resources for one another. Our nation thrives off of selfishness and conceit. God is love, and when we adopt his ways rather than our own, then we'll make sacrifices that'll promote life.