The Winner's Shout, the Loser's Curse, Dance before dead England's Hearse.
This couplet continues the "England biting the dust" theme.
After the "Harlot's cry" has wrapped England in its burial shroud, the people who are winning and losing in this dog-eat-dog society will shout and curse in front of the hearse that brings England's corpse to its final resting place.
The fact that there are so many exultant winners and bitter losers in the nation shows that this isn't a place where people are getting a fair shake, exactly—there could be more equality, humanity, and compassion in the mix.
Every Night & every Morn Some to Misery are Born. Every Morn & every Night Some are Born to sweet Delight. Some are Born to sweet Delight, Some are born to Endless Night.
Blake imagines the world—the physical world and the spiritual world—as a place where everyone is in either a happy or a sad state of being. But it's not static. People keep alternating between these states "every Morn & every Night." You might be born to misery, but the next day you're born to delight.
Again, Blake doesn't believe in an eternal hell, so "Endless Night" is really a state of being or a state of mind (it's not literally "endless"). It's suffering, to put it simply.
Blake aims for a weird, incantatory effect—by repeating "Some are born to sweet Delight" twice before ending with "Some are born to Endless Night," he heightens the dream-like feel of this whole process in a really eerie way.