I thought it was because he was an inconvenient loose end. Also, the bits describing it as a great artwork were surely a direct reference to Stockhausen saying the same about 9/11 - although here lart was a pale imitation of life. You can't really satirise that can you?"I like Sloane's forthright take on this but didn't really feel empathy with anyone in the first episode. I assume the artist topped himself at the end either because he was horrified with what he'd done, or horrified about what happened said about the world."
Edit: thanks for the NLP info