I think you've chosen what you go studying after work. It's of great value, because you chose it even though you're not very energetic after work. You can pay attention to another things that you can change instead of seeing something that you can't change.
I recommand you to take a shower with lavender, it will help you sleep early.
We wish everything is under the control of us, but it's not. Is this bad? I don't know. But it will be more boring if we can control everything in our lives. In fat, life is hard and like 苦海 as someone said. :P You will feel better if you recognize it. You need to know people who eat well, sleep well are real winners in our modern societies.
Do not take life too seriously, you will never get out of it alive. :P