(n.) A member of the Fronde.

agitator anarch anarchist belittler bellyacher brawler captious critic carper caviler censor censurer common scold complainant complainer crab crank critic criticizer croaker extremist faultfinder griper grouch grouser growler grumbler insubordinate insurgent insurrectionary insurrectionist insurrecto kicker kvetch malcontent maverick momus murmurer mutineer mutterer nitpicker nonconformist pettifogger querulous person quibbler reactionary reactionist rebel revolter revolutionary revolutionist rioter scold smellfungus sorehead subversive traitor whiner