Bro, have some standards.
In the novel, every dungeon looks and works the same way. Every monster acts the same way, and every fight has the same pattern. The monsters are very scripted, they don't use strategies, they just patrol and attack on sight. The only variable is the skills of the monsters and the skills of the party, it gets boring very quickly. Occasionally the author treats the reader to a secret room or a boss fight, but 90% of the time it's just an annoyingly meticulous description of every fight with every monster over and over again, no matter how many times the author repeats himself. The dungeons in the novel are incredibly generic and simple, there is no exploration, just mindless grinding until MC feels like trying the boss room. The dungeons and the fights inside were always a chore to read.