querulous

complaining in a whining way

Roots

-ous / -ious: full of or marked by a quality
queri: complain, lament, or grumble

Other words with the queri root

quarrel: an argument or complaint-filled dispute

Querulous speech sounds ready to quarrel: complaint as a tone, not just a single objection.

The querulous review found fault with everything, even the free coffee.

Querulous is a complaint word. It is easy to mistake it for query or quest because the spelling is close. Keep the jobs separate: query asks, quest seeks, querulous grumbles.