Three short lines, and a lot packed into them. The title, "(Re)tired," plays on two words at once: "retired" and "tired." Retirement is supposed to mean rest, but the pun hints that tiredness doesn't simply stop when the job does.
The lines themselves are fragmentary. "Off a little" could describe someone slightly out of sorts, or someone who has stepped away from work, or both. Then comes "the past I always have," which suggests the speaker can't shake what came before. The last line, "at work in a factory," lands like a memory that never leaves. Judging by the wording, the speaker seems to carry the old job around, even when they're no longer in it.
The mood is quiet, weary, and a little wry. There's no big complaint, just a sense that years of labor leave a mark. The broken phrasing mimics a mind drifting backward, unable to settle in the present.