I said usually through him means it was done through someone else. We will have to work on whether by him, through him and for him is one entity or more than 1 entity? The Father is not an instrument of no one. If it is 1 entity it is very simple it was done through him using the Word.
By 'usually' you are making an exception.
Also by introducing "If it is 1 entity it is very simple it was done through him using the Word' is attempting to infer into the verse what it does not state.
Instead use what was common during that era.
The explanation for 'through' is to distinguish 'from which' or 'by whom' something is created. 'From which' denotes creation emanating from the creator, and 'by whom' denotes the creator working with something that already exist. 'Through whom' denotes no prior existence of the created or the created emanating from the creator. This was to distinguish God from the pagan gods of the time.
For of Him and through Him and to Him are all things, to whom be glory forever. Amen. (Ro 11:36). (1982). The Father
has in these last days spoken to us by His Son, whom He has appointed heir of all things, through whom also He made the worlds;(Heb 1:2). The Son
“You, Lord, in the beginning laid the foundation of the earth, And the heavens are the work of Your hands. (Heb 1:10). The Son
There is no contradiction.
