See, peevish doesn't work, because it means that someone is easily irritated.
I'm not easily irritated because I'm irritated ALL. OF. THE. *expletive deleted*ing. TIME!
I was thinking more of this definition, especially the unimportant things part:
peev·ish
ˈpēviSH/Submit
adjective
easily irritated, especially by unimportant things.
"all this makes Steve fretful and peevish"
synonyms: irritable, fractious, fretful, cross, petulant, querulous, pettish, crabby, crotchety, cantankerous, curmudgeonly, sullen, grumpy, bad-tempered, short-tempered, touchy, testy, tetchy, snappish, irascible, waspish, prickly, crusty, dyspeptic, splenetic, choleric;