Of course evolution doesn't explain the origin of life. It's not supposed to. It is a theory about the changes that life underwent after it formed. There are scientific theories about the origin of life, however. These have much less convincing evidence in their favor than does evolution. Scientists are still working on this issue. On the origin of the universe, this too has nothing to do with whether evolution is true or not. The big bang theory exists to explain the way the universe developed. There is a good deal of solid evidence to support this theory just as there is for evolution. It strikes me that neither evolution or big bang theories are incompatible with creationism, however. Is it not possible that God created the universe via the big bang and then created life (whether via a special act of creation or abiogenisis or any other method is irrelevant), and then created the mechanism of evolution to allow for the wide diversity of life we see now? Could not "let there be light" refer to a big bang? (In the earliest stages of the universe, according to the big bang, light is all there is. Matter is created from the light) The Bible also gives the order of creation of types of life in essentially the same order as the theory of evolution predicts. Maybe the scientific theories and the Bible are consistent with each other. There is only one truth. If science and religion appear to contradict each other, the problem is with our understanding of either science, the Bible, or both.
I have no problem with either theory, as long as they are not used to explain the origins of life or the universe, which is often the case.
Science is a very good way of trying to understand all that God has created. It is, however, a very ineffective way of disproving God's existence.