If you're playing video games on your PC and are noticing some input lag, it might not be a hardware problem you're facing, but a well-known Steam issue.

Valve made a brave move with the launch of its Steam Controller in 2015. It's a pad designed for PC gaming on the sofa, and it removed the right thumbstick of a traditional controller and replaced it ...

You can use an external controller with the Steam Deck if you prefer it docked rather than in handheld mode. These third‑party controllers are great options.