'too much water' was a summary negative point in the IGN review of Pokémon Omega Ruby and Alpha Sapphire games.
On the face of it, that complaint sounds fucking ridiculous, but is actually very valid due to the way those games handle waterways; they are the only terrain filled almost entirely with a single Pokémon type, with all others having wide varieties.
This makes large sections of the game a pathetically easy and boring breeze even by Pokémon standards; one reliable Electric or Grass type and you're set.
However, that sentence was in the TL;DR bullet points of the review, which sounds fucking ridiculous without context.