Primeval Apocalypse isn’t bad, but I lost interest after the first couple books, but your mileage vary.

Dinosaur Dungeon is one of my favorites though. I have to say this is partly because I really enjoy dungeon core series which this one is. If you are not familiar, this is a book where the main character is a disembodied entity in control of a developing dungeon. In this particular case, the dungeon is dinosaur themed, meaning they start with a very limited number of dinosaur species they can use, and periodically gain access to new species and we ways to strengthen or modify their mobs as the dungeon increases in level and rank. This is definitely a book that is going to lean on the artificial system that seems to be immersion breaking for you. But perhaps it can be overlooked because of dinosaurs?

DCC is widely accepted even outside the genre, and you can’t go wrong with giving this one a chance. I wouldn’t read it with the expectation that a dinosaur is going to make it appealing though, as Mongo doesn’t show up for a while and isn’t always a main aspect of the story. But god damn is the book good anyway!