Try launching Steam from the terminal so you have a chance at seeing an actual error message, at least for the crashing games.
It might be the kernel as the other comment says since the 9070 is pretty new. If it works without issues on something like Fedora or OpenSUSE TW then that was probably the issue.
Running poweroff is one of the correct ways on anything Systemd (details). If that doesn't work then something is broken.
If you haven't done so already try looking into the journal. sudo journalctl -b -1 -e will take you to the end of the log for the last boot.
I am very sorry to remind everyone about the existence of Visual Basic, but it has:
And I know what you're asking: Yes, of course all of them have subtly different behavior, and some of them only work in VB.NET and not in classic VB or VBA.
The only thing you can rely on is that "\r\n" doesn't work.
GUIs do have advantages in things like discoverability. Honestly the 1983s Apple Lisa nailed this with the idea of having clickable menus annotated with keyboard shortcuts, so users could do the same thing faster next time. For some reason we stopped doing this (especially in web apps), but that's a reason to make better GUIs, not to RETVRN to the feature set of a VT100.
I don't know why we have to go on nonsensical diatribes about "UNIX wizards" though when we're fundamentally talking about a handful of minor UI improvements to things that already exist.
To be fair showing the overview on startup makes perfect sense on vanilla gnome, it's only dumb if you install one of the two specific extensions that partly replace it.