niggling

Annoying, troubling, or irritating in a petty way.

Mean; contemptible.

Finicking; fussy.

Finicking, fussy, or over-elaborate work.

petty, trivial, or inconsequential.

Excessively demanding of time or attention.

Finicky or pottering work

Present participle of niggle.

petty

(informal) small and of little importance