Persona 5 on a fairly decent system -> Horrible stutter and low FPS (~20)

Hi all, like the title says, I have a fairly decent PC, and I've tried all kinds of different settings but I'm getting absolutely horrible stutter and sub 24 frames per second  Any help would be greatly appreciated...

system:
i5 6600k
16gb DDR4 ram
Samsung EVO 980 SSD
Nvidia GTX 970
All drivers are up to date, as well as Win 10 pro




[RPCS3 settings]

:::::::CPU:::::::
PPU Decoder - LLVM Recompiler
SPU Decoder - ASMJIT Recompiler
Firmware Settings - Load liblv2.sprx only
Additional Settings - all checked (I've also tried all "Un" checked)
Preffered SPU Threads - 2 (I've also tried auto)
SPU Block Size - Safe
TSX Instructions - Enabled
Firmware Libraries - None checked

:::::::GPU:::::::
Renderer - OpenGL (I've also tried Vulkan)
Aspect Ratio - 16:9
Anisotropic Filter - 2x (I've also tried auto)
Default Resolution - 1280x720
Resolution Scale (150% (1920x1080))
Resolution Scale Threshold - 16x16
Additional Settings - None checked