what?how is that an upgrade?
According to Buddhism, living his suffering.
God Realm = Suffering through excessive attachment to heavenly indulgence
Demi-Gods (Ashura) Realm = Suffering through endless power struggle
Beast Realm = Suffering through living purely for your animalistic instincts
Hungry Ghost Realm = Suffering through endless hunger and unsatisfaction
Hell Realm = Endless suffering through punishment
Human Realm = Suffering but you also have the chance to escape the cycle of reincarnation in this realm
It's not clear if your soul ceases to exist after nirvana but Buddhism considers that a better thing than endless cycle of karma and reincarnation.