If you're troubleshooting controller issues or trying to figure out whether it's a hardware problem or input lag, one thing that really helps is testing the gamepad outside the game environment.

A lot of people assume it's the game, but in many cases it's actually stick drift, dead zones, or inconsistent input signals from the controller itself.

You can quickly check that using an online tester like this one:
https://devicexa.com/tools/gamepad-tester/

It shows real-time button response, stick movement, and input accuracy directly in your browser, so you can isolate whether the issue is coming from your controller or something else in your setup.