Looks like I'm not playing The First Berzerker: Khazan then. If the only draw to your game is how hard the combat is, then everything else probably sucks. Maybe make a good game instead of a hard game. I had no problem dropping the difficulty on Clair Obscur or Horizon or Mass Effect.
Mortal Kombat's approach is flawless and every game needs to copy it. Keep the game at full difficulty until a particular enemy kills you a few times, then gradually make that enemy slower or reduce its damage output or make it use easier attacks. Give the sweatlords an option to disable that difficulty adjustment so they can die to the same boss a thousand times, as is their wont