shortcut keys - No Terminal in Unity after faild upgrade from Ubuntu 19.04 to 19.10

How can I get myself out of this boot loop?

I am a bit at a loss, my Grub screen is empty (shows no options to choose from.) I now only have access to Grub options if I hold down the Shift key during the time Grub is being processed.

I got myself into this pickle while upgrading Ubuntu 19.04 to 19.10, and something went wrong.

I started going through the different Kernel options to see if one would get the system back up. The last one did. I was able to get to a login window; however, logging into Ubuntu would not work. So I tried logging in using the Unity Desktop option. This brought me to the Unlock Login Keyring. But the Unity Desktop UI is empty -- besides a auto-start opening Rhythmbox. Somehow in Unity or Ubuntu-MATE.
I can't get a Terminal doing Ctrl+Alt+T.

As suggested, using Ctrl+Alt+F5 works, but I can't figure out what is missing in order to boot into Ubuntu Desktop 19.10, tty5 login states:

Welcome to Ubuntu 19.10 (GNU/Linux 5.3.0-19-generic x86_64)

I tried login into unity --:1 to get into a standard UI
based on this helpful post but got this:

compizconfig - Info: Backend     : gsettings
compizconfig - Info: Integration : false
compizconfig - Info: Profile     : mate

Switched to profile 'unity-lowgfx' (for enfironment 'mate')
compizconfig - Info: Backend     : gsettings
compizconfig - Info: Integration : false
compizconfig - Info: Profile     : unity-lowgfx
WARNING: no DISPLAY varable set, setting it to :0
compiz (core) - Info: Loading plugin: core
compiz (core) - Info: Starting plugin: core
compiz (core) - Info: Loading plugin: :1
compiz (core) - Error: Failed to load plugin: :1

It looks like it is somehow switching to mate and fails loading the plugin.

Doing a reboot brings me straight back into some leftover Ubuntu-MATE; without UI -- not very helpful.

I solved my own question with this answer:

I had to disable "Auto Login" and then the screens were normal again.

To summarize the link:

sudo -H gedit /etc/gdm/custom.conf

and commented out these lines (by placing a # in front):

AutomaticLoginEnable=True
AutomaticLogin=username