A video game can't be resumed to "It's basically a group that kill a big monster". If the game is just that, then it's failing somewhere.
Let's take an example. Right now, I'm playing Monster Hunter : World, a fairly popular game. As the title imply you set out in the wilderness to hunt...giant monster. If Capcom would have left it at that, the game would be boring. But you have multiple things to take into account :
- The battle system : Each hit you want to land must be tough over, if you don't want to be punished by the monster. But that's also to have the pleasure to see a monster knocked down after you managed to land a massive hit on it.
- The reward system : You need part of the monsters to make better weapon or armor. You can get specials parts by breaking/cutting parts of a monster, like the tail for instance. It also help in the fight by weakening the boss.
And here I'm only scratching the tip of what a hunt entail.
An other exemple : Dark Souls, a well acclaimed game from a few years prior.
Sure, in this game you will fight big bosses in a arena. But the trap-filled road you have to take, to bypass the numerous ennemies you encounter or the PVP invaders to even make it to the arena is what make the game fun. Here, the "big monster" is almost the reward for clearing the road to it.
My point is that a game is not just about "killing a big monster". It's how you can put this battle in the battle system you designed, in the context you wanted it to be. And how the players feel rewarded after that. In my sens, this is a form of art in and of itself. The diadem and Eureka both fail completely at that because they just throw monster at you that players can just zerg down until the FATE is over. If there was some depth or well tough mechanics behind it, the players wouldn't hate the FATE train so much.
This is not the first time I read this argument, and I really don't like it. Why are people playing poorly? The game still reward them even if they are afk.
It's normal to think that if the game rewards you, then you are doing the right thing, right?
It's always easy to say that people are at fault but, and I'll say it again, it's mostly because they are lured by bad game design to begin with.
Will a MH monster will give you its horn if you don't cut them? No.
Will Eureka give you xp and crystals while you were afk watching Netflix the entire duration of the FATE? Yes, and that's absolutely ridiculous.