Interviewing sucks, really hard, and when you put so much of your creativity up on the line like that it can feel like a test of the balance of your soul. Its not, its a test of whether you light up the right spots in the brain of someone you've never met. For this reason, and for many others: if you're giving 100%, don't. They don't deserve your 100% and would never even be able to benefit from it if you still give it. This was advice that not everyone needs, but I absolutely needed at one point. Hope you can find a brighter path.