I made a very simple Cheat Engine table. It's just pointers for HP, Stamina, Ammo, Reloads, Molotovs, Glowsticks and Clothing. You can lock the values to have them be virtually infinite. Do note that, for some bizarre reason, the game uses weird-ass Float values for these so I set-up dropdowns: Use those to edit the values instead of manually inputting numbers.
View attachment 2531609
IMO the game goes beyond "difficult" and just becomes unfun and cancerous to play after like, the first zone, so the cheats help make it more tolerable until you can unlock the "true" gallery.