Yeah, no worries. Could be a Valve issue or some weird thing I did. It's an easy enough issue to fix on my end and absolutely inexplicable with no clear causes. If you wanna know the series of events that happened, I'll give you it.
-I was testing out various games to see if they work on Steam OS. A few didn't work or I messed something up
-I then try to get them to run through Steam so I can play through Gaming Mode
-Feyna's Quest didn't load through Steam, so I thought I must've messed up the path or perhaps it just won't run that way as a few games don't
-I go to the folder that holds Feyna's Quest and click on an executable named something like "Feyna's Quest" to test if it's actually the game (I don't remember the exact name)
-In the task bar below, a program icon I don't quite recognize opens and I click on it
-This causes the screen to constantly alt tab through every single window constantly and flicker and be unresponsive. So I forced shut down
-When I restarted, I could no longer log in to Steam since it would crash on log in and it rendered gaming mode unusable
Here's a quick note of things I tried to do before testing Feyna's Quest. I tested out a few games using the same method I did and most worked well enough but there were a few problem entries. I tried to get Anodyne working not realizing that the Linux version was no longer supported as it relies on a now defunct Adobe Service. And the program it tried to run to download the non-existing Adobe program looked similar but might've not been the same. The issue could instead be caused by circumstances far before the game and Feyna's Quest might've been just the game to open an already corrupted folder and cause the cascade