You can save system resources before even launching the game through the Epic Games Launcher :

Set to Medium or Low . While "Epic" helps with visibility, it is demanding on older hardware.

Keep this at 100% if possible, but lowering it to 75% can provide a massive FPS boost on very weak systems.

Always use Fullscreen for the lowest input delay and best performance.

Enable this in settings and use commands like -useallavailablecores to ensure the game utilizes your entire CPU. Windows & System Optimization

Set to Performance - Lower Graphical Fidelity . This reduces visual quality but significantly increases FPS.