I wonder about that, i think the only game you could associate the idea of colonialism and Monster Hunter is on MHworld, and is very subtle almost not there.

In Monster Hunter 4 you are in the old world, going around doing your job as a Hunter for a Caravan when suddenly you get recruited to save the world from the MHunter equivalent to Dracula from Bran Stoker .

Monster Hunter 3 you are in the new world and its "plot" (because rly, the first Monster Hunter to have a real plot is 4) is about you being a sort of Castaway, finding yourself in a native village and working there.

Meanwhile, in Monster Hunter World you have a exploratory group, who is already in the new world for at least 2 generations, and you are exploring natural resources of this new country, but there are natives there, the Grimalking.

Now, i don't agree with the author that the colonialism is intended, or that the authors of the game are aware of it, i think its just a consequence of the plot and its presence is very subtle, using a definition of Colonialism very broad.

But yes, you can argue that, even if the guild is not exploring the Grimalkin, even if the purpose of the expedition is to research(why the elder dragons are going to the New world), it would still be colonialism.

And such colonialism have nothing about hunting, or in this case the problem of Overhunting.

You see the Overhunt is more of a reflex of this being a game, when you take a quest (The Greatest Jagras for exemple), its not like you are hunting 2 monsters of the same species, you are hunting the same specific monster.

The same way you are hunting 1 single Zorah Magdaros or 1 single Xeno`jiva.

This mechanic is used to extend the gameplay time and giving purpose to do a quest or hunt a specific monster multiple times, but for the lore, you did not hunt 100 Rathalos, you hunt 1.

In other forms of media for the franchise (manga for exempe) a single monster is enough for multiple armor pieces and weapons, and hunting is strictly regulated, but then, such limitations wouldn't translate well in a game (what you mean, i can't hunt a Rathalos now? only in 1 week? what do you mean they are extinct? what you mean no one wants me to hunt a gipseros, i want to hunt a gipseros)

This is one of the cases of gameplay over logic, if monster hunter tried to become Shadow of Collosus it would be a diferent kind of game, altough, a Monster Hunter spinoff in such a vein would be nice.

We could also go in the morality of hunting or eating meat but i prefer not to touch in that.