Did she just reset him to level 1?
If that forehead wound is that she gouged out his main core, and he's been torn off from the rest of his body, then yeah he doesn't have a lot going for him right now.
Grey, you really need to change your attitude, son. Not only did an extremely powerful demoness just oneshot your sorry ass but she also has three other friends, none of whom will be overly happy to see you.
Now is not the time to be a pouty teenager.