"Why don't they help us poor people...?"
Oh like how you helped nobles throw away their "playthings"? You closed your eyes when those horrors occur, and only when it concerns you go on your high horses. You were part of the problem when you serve the nobles, you really don't have any moral ground to stand on.
"The real reason I became a devil ... was so that I can kill myself..."
Really now, is that supposed to make us feel pity you? That's just stupid, instead of killing yourself without bothering anyone you go on a rampage, killing people who wanted to live just like you. I'm glad this character is gone.