Why is life on Earth so imbalanced?
Because the rapid evolution of life to avoid global catastrophes from happening, has advanced many that had previously been in the Underworld, into material life amongst man. In addition, most angelic beings have gained so much power that they have become Angelgods. The angelic realms have become far greater than the demonic realms — an imbalance.
At a practical level it creates the following conflict. The angelic realms embody holding the old status quo in place. The demonic realms embody the chaos that ensues from dissolving old patterns to potentially bring in the new. When more power is applied to hold the old patterns in place, than to dissolve the old in favor of releasing new potential, a conflict arises (a kind of push-pull).
Where are the additional demons coming from?
Those who have been planning or participating in the mass murder of humanity, will be finding a new residence there upon leaving this life.
Update (January 18, 2022):
To clarify, the Seer is speaking here of those currently in human form — the politicians, scientists, etc. — participating in this global agenda, that will find a new home in the Underworld. She adds, "They will not ever be able to incarnate again." Also see: Confined to the Underworld