They do exist. All these gods we hear about in the past are fallen angels, and rephaim.
Deuteronomy 32:8 "When the Most High gave to the nations their inheritance, when he divided mankind, he fixed the borders of the peoples according to the number of the sons of God."
They are the angels that rule over the nations. Daniel 10:13 "But the prince of the kingdom of Persia withstood me one and twenty days: but, lo, Michael, one of the chief princes, came to help me; and I remained there with the kings of Persia."
After Jesus completed his mission the gods actually stopped working. It caused Plutarch to write about the cessation of oracles and even the death of a god, and it caused others to bring accusation against the Christians as Eusebius relates.
“Nor, since the divine power of our Saviour in the Gospel shone forth like light upon all men, is any man now so mad as to dare to propitiate the murderous and bloodthirsty and misanthropic and inhuman daemons by the murder of his best-beloved, and by the slaughter of men in sacrifices, such as the sages and kings of old, being verily possessed by daemons, loved to practice.
But with regard to the fact that the evil daemons no longer have any power to prevail since our Saviour's advent among men, the very same author who is the advocate of the daemons in our time, in his compilation against us, bears witness by speaking in the following manner:
[PORPHYRY] 'And now they wonder that for so many years the plague has attacked the city, Asclepius and the other gods being no longer resident among us. For since Jesus began to be honoured, no one ever heard of any public assistance from the gods.'
This is Porphyry's statement in his very words. If then, according to this confession, 'since Jesus began to be honoured no one ever heard of any public assistance from the gods, because neither Asclepius nor the other gods were any longer resident,' what ground is there henceforth for the opinion that they are gods and heroes?”"
Psalm 82 also parallels this nicely.
