Are gases easier to squash than the other 2 states of matter?

Answer 1

By "squash" it would seem you are thinking of compressing into a smaller volume. The simple answer to that is: YES.

Because the molecules in gases are more widely spaced than solids or liquids, they have less resistance to being brought closer together, i.e. squashed.

Answer 2

Yes, gases are easier to squash than solids and liquids because their particles are further apart and have more freedom of movement. When pressure is applied to a gas, its particles can be compressed closer together, unlike solids and liquids which have more closely packed particles.