The speaker feels overwhelmed by being fully alert in a world that seems built for people who aren't. The opening line, "Too awake for the modern world," sets up a mind that can't relax or tune out, and the second line repeats it as if the speaker is half proud, half worn down by the admission.
The middle lines are harder to pin down. "Eat it up, don't miss a bit" sounds like a pushy voice telling the speaker to consume everything, while "Oh, how I struggled for this?" ends on a question mark, as though the reward isn't what was hoped for. The mirror that "never lies" suggests uncomfortable self-scrutiny, and "how it was to be him" hints at a sense of distance from another version of oneself, though the poem doesn't say who "him" is.
The final line, "System shutdown. Reboot," fits the title: the speaker talks like a machine trying to reset. The mood is tense, numb, and a little darkly ironic.