In essence, is the concept of man as a heroic being, with his own happiness as the moral purpose of his life, with productive achievement as his noblest activity, and reason as his only absolute.

Happiness as our moral purpose? Don't make me laugh, she must have issues with weakness and as she preached human perfection she obviously did. People were not good enough for her.

If she separated God from our rights to prove God's existence to atheists then what was she? A philosopher, a useless person who is no use to humanity at all.

See Wittgenstein's Poker to see what creatures philosophers really are.