Yes, He did change His mind. He said "Let me ... consume them"
God, through the prophets, says He changed His mind.
Exo 32:9 And the LORD said to Moses, “I have seen this people, and indeed it
is a stiff-necked people!
Exo 32:10 “Now therefore,
let Me alone, that My wrath may burn hot against them and I may consume them. And I will make of you a great nation.”
Exo 32:11 Then Moses pleaded with the LORD his God, and said: “LORD, why does Your wrath burn hot against Your people whom You have brought out of the land of Egypt with great power and with a mighty hand?
Exo 32:12 “Why should the Egyptians speak, and say, ‘He brought them out to harm them, to kill them in the mountains, and to consume them from the face of the earth’? Turn from Your fierce wrath, and relent from this harm to Your people.
Exo 32:13 “Remember Abraham, Isaac, and Israel, Your servants, to whom You swore by Your own self, and said to them, ‘I will multiply your descendants as the stars of heaven; and all this land that I have spoken of I give to your descendants, and they shall inherit
it forever.’ ”
Exo 32:14 So the LORD repented (וַיִּנָּחֶם NaKhaM, Niphil waw-sequential : from the harm
which He said He would do to His people.
(Niphal)
- to be sorry, be moved to pity, have compassion
- to be sorry, rue, suffer grief, repent
- to comfort oneself, be comforted
- to comfort oneself, ease oneself
Psa 106:23 Therefore
he said that he would destroy them, had not Moses his chosen stood before him in the breach,
to turn away his wrath, lest he should destroy them.
You say He didn't mean what He said, because you don't want to have to go back to the drawing board and reformulate your complex theological schema.