Adding some more instances, as it also happens when my wife is trying to play over PS Remote Play, and it was so bad today over steam remote streaming that the game was unplayable, even though the picture was perfect - as if i was playing at my pc.

Platform?
Windows, Steam Link, and PS Remote Play

Which controllers specifically did you try?
Dualshock 4, XBox Series X

When using wired method, did you disable any bluetooth options to avoid interference?
Yes.

Do you have multiple controllers or other 3rd party devices hooked up the machine?
Just mouse and keyboard

Did anything change in the computer's environment that may have contributed to the problem?
No

Try running a clean boot on the machine to see if that may help (disable any programs that may be interfering with the game such as discord if applicable)
It happens no matter how much or little anything is running

Wired or wireless connection:
Both

Internet Service Provider:
Phynx Fiber (600 mbps up and down)