That is a weak argument.
Lack of evidence is not evidence of lack.
Sure, it shows the tie between the Father and the Son, but that does not show the Holy Spirit is not God.
The question still remains then.
Who or what is the Holy Spirit?
If He’s not God, then you have a created being functioning as God.
The fact that the Holy Spirit exists is beyond dispute.
You are left trying to explain who he really is.
I showed you multiple scriptural views of the Godhead and the holy spirit was not present as part of the Godhead. What is your explanation for those passages?