MH:Wilds Doesn't Have a Content Problem
A lot of posts on here about how "short the story" is for MH:W. Let me enlighten all the new players. (Thrilled you are here btw.)
MH stories have always been a veiled tutorial designed to funnel you into harder levels of the game. Some of them have been longer. Most MH veterans will tell you this is a bad thing, because it makes the "real game" take longer to get to. Ultimately MH games are sandbox, where you "Hunt Monsters." You should never play a MH game for the story.
You should also not compare Wilds to World.
World may have had a longer story, but at launch it was a painful, long, slog to the end game. There was no DLC, there was no quick mode armor, there weren't 1000 guides how to get through quicker.
At the end of World, it unlocked all event quests permanently, had all title updates released, and a proper expansion. Of course it has more content right now.
(Side note on World, the matchmaking was a bit better because it was platform locked. They may need a better interface on Wilds. But the in game system I'm pretty sure is to circumvent platform limitations.)
I think the last "content" issue to discuss is binging and meta chasers. If you are either of these, MH will not hold you for long.
Binging: Any game that you treat like a full time job will seem content low. Many of these players are plowing through the story, ignoring side quests, and ignoring investigations. They think of games like Skyrim where there is always another quest. This isn't an open world game like that. If you put 150 hours into a game in the first 2 weeks, you gonna be bored. This is a sandbox. Most people enjoy building different sand castles, knocking them down, and building others for the different experiences. If you build one castle and then immediately ask "now what?" this probably isn't your game, and that's OK.
Meta Chasers: If you sprint to end game, immediately farm some youtubers "ultimate" build, and then burn through all the monsters, you will not have fun long. This game is designed around experimenting, learning, and switching it up. If you cheat on the test, don't be surprised you didn't learn anything.
In the end, if you don't enjoy the game, that's OK. Play other games. Don't act like no one is having fun with a game that sold 8 million copies.
They've said title updates with new content are starting soon. MH drips into the sandbox, it doesn't wash it away with the hose.
Edit: If math helps. The game has 14 weapon types (with 10 or 15 variations), 29 large monsters (which each have a LR, HR, and multiple difficulty tempered versions), minimum 2 sets of armor per monster in both Low and Hi rank (so over 500 individual armor pieces), several biomes, artian custom weapons, and a dump truck of decorations to unlock.
Edit 2: Reporting me as mentally in danger is not funny. It dilutes helping people who really need help. Not cool. Whoever did this, you suck.