I can't remember if I mapped Q myself, or it came as a default. I was certain it was default, but maybe I'm remembering it wrong. But yeah, I currently have Q mapped for the skill trigger. Q is for quit or back only when in a menu.
And an update on the issues I mentioned above, it seems the recent update 1.07 for Elden Ring clashed with the changes I made for the ultrawide screen mod. After checking integrity of everything, and re-apply the ultrawide mod, it's been fixed. So, I no longer have a reason to stop playing.