The speaker is searching their own mind for where things went wrong, looking for the "seeds" of dreams that were lost or misplaced and have since grown into nightmares. Medication doesn't help. Neither do the usual ways of finding peace: the speaker says there's no point mocking meditation, gods, yoga or "psychic mumbo-jumbo", which suggests they've tried or considered them and still can't escape the "beasts within," fears and impulses that have been fed for years.
The feeling is one of exhaustion and dread. Every movement seems risky, as if it could become a "suicide bid." The final twist is bleak and a little darkly ironic: death, the obvious way out, isn't a clean escape, because "the dead too are restless." The mood is anxious, trapped and heavy. The short, plain lines and the lack of any comforting resolution leave the reader sharing the speaker's sense that there is no quiet place to retreat to, not even in death.