Yes and no.So because someone doesn't enjoy a game its the game's fault? All games have to be everything to all people? Pure casual bullshyt.
Yes it's the games fault. No it doesn't have to cater to everybody, and that has nothing to do with what's "casual" or not.
Monster hunter isn't a difficult game. You don't need to be an expert with the sticks like you do with other action games. There's no detailed or difficult platforming or exploration. Strategy is basically whatever weapon you want to use and bringing enough potions with you. Online is broken as fukk right now.
Only thing appealing is the constant grind for more materials so you can make weapons to grind more. To some of you, that's enough. To me it's not enough due to all the other shortcomings.