After searching on these forums for solutions to the steam issue and other research, I found that there is a driver metapackage that needs to be downloaded through Synaptic Package Manager called simply as "nvidia-driver"
After the long installation of it I rebooted my PC, what resulted stunned me and I was this close to giving up on Sparky as an operating system. It had booted up without my application icons on my taskbar, no files on the desktop, i could run terminal but not root terminal as it bugged out gsku. And on top of that, nothing could be edited because the system was deemed as a "read-only system". Nothing was working, not even Firefox.
But I decided to reboot once more just to see if there was still a chance it'd recover. and now it works fine and now steam is working!
Note: I've noticed a very significant black screen time after GRUB with this extra driver installation, so don't let that trouble you, your PC probably isn't frozen or not going to load, it's just going to take it's time.
EDIT: Seems this "read-only system" problem is occuring occasionally on boot now, I'll need to make a new thread on it..