Sacred Haven of Debauchery

therefore, I will simply note that, according to player reviews, Dark Souls is an interesting game due to its interesting combat system.

You misunderstood them, or they didn't express themselves correctly. As already mentioned, it's interesting because of the atmosphere, as well as the level design and the overall concept of fighting through challenging locations and exploring through shortcuts. The combat system involves choosing the weapon that best suits your build if you're experienced, and mastering the moveset of that weapon. But in general, all the mobs are easily defeated once you get good; a more interesting combat system can probably only be discussed in PvP.
And many people also enjoy occasionally defeating bosses, although opinions about them vary greatly depending on the specific game.