Comment by andix

I had to look up what curmudgeonliness means, Wiktionary was extremely helpful:

curmudgeonliness: The state or condition of being curmudgeonly.

okay, let's look up curmudgeonly:

curmudgeonly: Characteristic of a curmudgeon; churlish

nearly there:

curmudgeon: An ill-tempered person full of stubborn ideas or opinions, often an older man.