Why was there no significant Confederate resistance after Appomattox? What resources, in men and material, did the Confederacy have left?

I think the standard answer to this is essentially that Lee did not see a the Army of Northern Virginia becoming a guerilla forces as honorable, or "practicable," so he decided to surrender, and since he was the most respected man in the South, Johnston and everyone else followed suite despite Davis saying otherwise. I suspect really the root of a lack of Confederate resistance after April, 1865 is simply that the war was fought to preserve slavery and the planter lifestyle, and a guerilla resistance would not further this goal at all. Maybe you could wear down Federal forces, and maybe still get independence for the deep south at least, with another 4 years of bushwhacking, but all your slaves would be free so what's the point?

If the rest of the Confederacy took up Davis's cause of continued resistance, what would be left for them to resist with? I know you had Johnston and the remnants of the Army of Tennessee in NC, and a decent force in Kirby Smithdom. None of this would amount to an effective field army, but maybe it could be used asymmetrically?