It dates back to around 2018 when Steam really did cause major issues. It's been resolved years ago but the poor reputation can be a persistent thing. There also is the matter of Steam's browser causing memory leaks if it runs for too long in the background. There is a very simple solution to this though, I just run Steam from a shortcut with added -no-browser parameter and launch ESO from the tray icon instead of the library window.As said many times, it's a mystery to me how the experience with Steam can be for some so good and for others so bad.