Can't get to usable. Hardware issue?

[chootsmagoots]

UPDATE: I entered multi-user mode (no GUI) and I do not freeze. After some time, I am able to access an interestingly incomplete array of features that suggests to me that the eMMC is being *very* uncooperative... I can `lsblk` which produces a reasonably expectable output, but I cannot simply `ls` from the home directory. That command, and many others, produces the output: `-bash: /path/to/w/e: Input/output error`

`cd /`, `cd`, `cd bin` (working in `/`) all appear to work, but again, `ls` fails everywhere. 

`sudo -i` also fails, returning `-bash: /usr/bin/sudo: Input/output error`