Someone who picks opponents that are weaker than them, so that they can feel superior but they never pick anyone as strong or stronger than themselves.
Context, someone who brags about being an intellectual arrogantly, but only argues with weaker and dumb opponents to win debates while avoiding more intelligent opponents in case they'd be exposed.
I'm looking for a word to describe their target mostly or a phrase that cover this situation.
Words that come to mind are "They only pick on the [weakest link] or [soft targets]", but I still think there's better ones out there or better ways of phrasing this!