I didn't fail to address but you have no ears to listen because you don't want to.
Mat 28: 19 is in a SINGULAR Name of God containing titles of The F,S, HS.
The present with you is that you are taking this verse out of the overall context of God being The Father of Israel as His firstborn son and God manifested in the flesh as the True Israel to fulfill obedience to The Torah on behalf of Israel and Mediating for Israel.
Gal 4:
4 But when the completion of the time came,
God sent forth His Son, born of a woman, born under Torah,
5 to redeem those who were under Torah, in order to receive the adoption as sons.
It's amazing this scripture doesn't exist in your Bible.
He didn't come to earth to teach nonsensical Trinity but redeem Israel from the curse of the Torah.
Israel is God's firstborn son. Israel is His people and not people of Christendom.
Gal 3:
13 Messiah redeemed us from the curse of the Torah, having become a curse for us – for it has been written,
“Cursed is everyone who hangs upon a tree.”
Messiah Redeemed 'US' (Paul is writing to Israel) from the curse of The Torah
There is no Trinity of Persons anywhere in scriptures. You have been lied to and a million repetitions of this doctrine doesn't make it true.