Complex sentence: Junius was not a radical anti-royal Whig as many texts suggest though he did trouble himself with explaining to the public the real constitutional role of the "royal prerogative", and (if engaged correctly) how it benefited the country.
Split into simpler sentences: Junius was not a radical anti-royal Whig as many texts suggest. However, he did trouble himself with explaining to the public the constitutional role of the "royal prerogative", and (if engaged correctly) how it benefited the country.