niggle

niggle verb uk/ˈnɪɡl/ us
[ I,T ] to worry or annoy someone slightly for a long time

изводить, надоедать
a niggling injury   niggle about/over, etc UK
to complain about things that are not very important

ныть, жаловаться на что-либо
She kept niggling about the extra work. niggle noun [ C ]

жалоба