>game has PS2 graphics
>game have framerate issues just from walking around
>there's nothing taxing on the screen
>it still stutters
>opening lots of menus at once introduces lag
>game struggling to catch up
>heavily menu-based gameplay
this is a PS3 game
How do you fuck up this badly?
It's probably emulating a PS3 environment to run on
Gust didn't even make a 3D game until the absolute end of the PS2's lifespan, that's how.