Working with last stable stock rom?
It does NOT work with stock ROM. Let alone, Pie ROMs.
The SD625 chipset was never intended for "heavy" 3D games, it's more of an energy-efficient chipset.
NathanBrake ...and also this.
MOD EDIT: quote removed
Did you tried other games? On stock AndroidOne did the game you're describing here runs well?
Saying 'kernel is crap' is really a kind of harsh thing to say, when the developer tried hard to work with it....
I advise trying other brands than Sandisk, if problems persists. There are some problems when using Sandisk SD Cards like sudden read-only SD card. I've tested other cards (Eaget, G.Skill, Gigastone, Samsung, Transcend) and they were better to me....