Yup, same ELF errors. I think the jumbled ones are slightly different but mostly the same.

shabamjenkins@ShabamJenkins:~$ uname -a Linux ShabamJenkins 5.15.0-78-generic #85-Ubuntu SMP Fri Jul 7 15:25:09 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

I tried uninstalling TF2 from Steam, I deleted the Team Fortress 2 folder (/home/shabamjenkins/.steam/debian-installation/steamapps/common/Team Fortress 2), restarted, reinstalled and launched again. I still get the same errors. Should I uninstall Steam altogether (or was that what you meant by uninstall>delete>reinstall)?

I just tried to clear cache and verified the game files again but I get the same results when trying to launch the game.

I usually install updates as they pop up: drivers, apps, whatever. Between the 2 days of TF2 working and then TF2 not working, I’m pretty sure there wasn’t any real updates.