gripe
n. countablen. a small, annoying problem or complaint. You use this when you want to sound a bit more serious than just saying 'complaint'.
n. a complaint or grievance, typically one that is minor or trivial in nature.
The only gripe I have is the slow internet.
While the car is otherwise reliable, the owner has a few minor gripes about the interior lighting.
The software update was generally well-received, though users voiced several gripes regarding the new interface's lack of customization options.
From Middle English gripen, from Old English grīpan, from Proto-Germanic grīpaną, from Proto-Indo-European gʰreyb- (“to grab, grasp”). Cognate with West Frisian gripe, Low German griepen, Dutch grijpen, German greifen, Danish gribe, Swedish gripa. See also grip, grope.