I don’t suppose the specific adjective you’re looking for happens to be querulous, is it? Per the OED, it means: Complaining, given to complaining, full of complaints, peevish. Another possibility might be belligerent, which was originally from the Latin for war-making, but now more often means simply combative in a more general sense. There’s also bellicose, which may now carry additional connotations of loudness. You can find synonyms to these at the links given above.
