System stuck on "Network Manager Script Dispatcher Service" after updating & rebooting

Nice one, glad to hear it!

Since you are using Grub, you can set the GRUB_TOP_LEVEL option in /etc/default/grub as described in this topic:

It should look like this:

GRUB_TOP_LEVEL="/boot/vmlinuz-linux-lts"

Then regenerate the Grub configuration file again.