Demonbane can't even break the boundaries of his medium. Superman Thought Robot can move beyond the confines of the comic panel.
And to invoke Hyper-Crisis theory, STR is so strong that his name abbreviated is the same as the abbreviation fiction universes use to denote "STRENGTH", the ability to effect one's physical environment.
How can any fictional character defeat an entity powered by the platonic ideal of Heroism? An instrument of conflict driven by the Story Engine?