Yes, I still have /etc/X11/xinit/xinitrc -typo there.
Do you still have an /etc/X11/xinit/xinitrc ?
If not, you may have to copy it back again.
I was simply trying to answer your question as to whether to us
or not, but perhaps I confused you.
So along the lines of what Jas was saying, and with now knowing your userid
My suggestion would read as
sudo cp /etc/X11/xinit/xinitrc /home/alex/.xinitrc