Why aren't Bug-type Pokémon weak to Ice-type moves?

Question

When you take into account the reason Dragon is weak to Ice (Dragons are cold-blooded creatures, and ice can make then lethargic), and find out that bugs are cold-blooded little creatures, you would think that Bug would be weak to Ice, right? Wrong. Ice only does neutral damage to Bug Pokémon that aren't Grass, Ground, Flying, or Dragon (I know, there aren't any Bug/Dragon Pokémon, but still).

Comments

I think they generally try to increase the number of neutral matchups so the type chart is easier to remember.

Answer 1

From a balancing sense, Bug really doesn't need another weakness when they already have so many. If you're looking for a lore/flavour reason, it's mostly Game Freak logic, but I think this answer explains it rather nicely.

Hope I helped!