These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Let's put this in perspective. Droguza is The Rival to one of the game's two heroes, whom you've fought three times before. Demon Droguza is when The Empire decides to power him up with the Mineral MacGuffin Great Spirit Stones and turn him into an immobile, horrifically mutated monstrosity. With physical attack power that's through the roof. Think that's not so bad? He's got ranged attacks as well - a sweeping tail laser that slices across the midpoint of the battlefield (where you will be caught, unavoidably) and a giant energy ball that goes boom on your little cluster of fighters and nukes roughly half of their HP on a normal, non-grindfest playthrough. And your healer will very likely die. Add in the fact that the ressurection spells aren't likely going to be available to you at this point....
The Woobie: Darc, he has to bury BOTH his parents!