Disclosure of Secrets, page-803

There is no validation of the Trinity at all, Christians were mislead and remain so.

Your misguided opinion is noted.

another advocate is not the Holy Spirit,

I was expecting you to say that so I went for the other verse.
This is the one I should have used but refrained for future discussion on the matter which is now.

25 “All this I have spoken while still with you. 26 But the Advocate, the Holy Spirit, whom the Father will send in my name, will teach you all things and will remind you of everything I have said to you.

I was incorrect to think you have researched reknown scholarly experts and it appears you haven't even read the biblical passages that are used to support the trinity.
But I'm correct in saying it would be pointless presenting anything to support trinity validity to you.

The Holy Spirit is not a person, it is the Grace of God in action, it's God.

Your less than researched I expected opinion is noted.