Not all religious traditions that believe in gods believe in the concept of hell, or the concept of heaven, and depending on the religion different gods favor different things. Frankly, even the idea of a god existing doesn’t mean that the god has some ultimate say over what’s right/wrong.
I’ve got cats that depend on me, and I care more about their well-being than I care about mine. Also weed really helps to mellow me out, especially when the depression is really bad. It’s not perfect, it mellows out the good feelings along with the bad ones, but hey it’s better than nothing.