A person who cangles; someone who argues, wrangles, or engages in petty disputes.
An agent noun formed from 'cangle' plus the suffix '-er,' following the standard English pattern of creating names for people who do something (maker, dancer, cangler).
If you're a 'cangler,' you're basically that person who always finds something to fuss about—the word itself sounds vaguely pejorative, which makes sense because constant bickering isn't seen as an admirable trait!
Complete word intelligence in one call. Free tier — 50 lookups/day.