Is Kali Linux 2 broken?

This might be just on my part but I really doubt that. I'm running it in persistence from USB, the most notable problems come when trying to login as root, can't it just acknowledges test and even the rate times I manage to get in as root no matter how many times I change the password it retus to toor ... I've also stopped being able to boot from startup and have to boot from BIOS, sometime after attempting to log out the system crashes and I'm left in a empty screen with a blinker one time it tued out be shell and I could still type commands I just couldn't do anything with a gui....Has any one else also experienced this?

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