The Watchtower is dead wrong about "the end" and about Armageddon.
"The end" is the fall of religion, and the rise of man.
And Armageddon is a situation - a long war - not an event - the war between ideological opposites: religion and its nemesis the liberating gospel of grace.
According to religion, eternal life, a right standing with God, and a clean standing with God, are earned.
The gospel message says they are imputed as priceless free gifts to any that will receive them (Rom 3:23-28).
“Religion and its defenders have always been the most insidious enemies of the true faith precisely because they are not glaring opponents; they are imposters" (“Waking the dead” by John Eldredge)