After the Kiter used up all his javelins, it ran around the garden, avoiding attacks from the Scorpio King who just flung rocks around randomly. It destroyed most of the garden and Hugo immediately inferred that it wasn't as intelligent as Ymir.
Although, comparing the bug to Ymir was not fair, considering the latter could speak in the human tongue despite it being a monster.
The scorpion also had a disadvantage, being the lack of a lot of sand in the garden. Once beings reached the S-rank, their peculiar existences transformed parts of their surroundings to fit them. So that was to say, they were so used to the natural habitats that they had to evolve the environment instead of adapting to it.