Playstation All Stars Battle Royale has got some problems on my pc

Hi everyone! While I was trying Playstation All Stars Battle Royale, I noticed there it was a few issues:
- Low FPS (Games run at 40-60 fps during menus and 4-14 fps during fights)
-Stuttering Audio
-Long loading times (almost 2 minutes)
-Random crashes or freezes
Does somebody knows how to fix those issues?   If they're needed, here's my PC specs:
CPU: AMD A8-7410 APU 2,20 Ghz
GPU:AMD Radeon R5 Graphics
RAM:12 GB (11 GB usable)
Operative System: Windows 10 Home 64 bit
Mother board: Acer TRICERA_CZL
DirectX: DirectX12
OpenGL: OpenGL v1.3
Vulkan : Vulkan v1.2

Thanks

-Kris 07

[Edit]

I tried to set preferred spu threads at 1, now I reduced Stuttering, now the game runs at 60 fps on 2D menus, I fixed random crashes, but loading times are still long and the game is still unplayable during fights (8-14 fps)