You completely ignore the use of θεος for someone other than God and therefore you make two Gods because the only true God is the God of Jesus.so God saying His Son is God isn’t true.
Also read and open those blind eyes.
And we know that the Son of God is come, and hath given us an understanding, that we may know him that is true, and we are in him that is true, even in his Son Jesus Christ. This is the true God, and eternal life.
1 John 5:20 is calling the Father true God as he the one who John calls “him who is true” already twice in the same verse. This verse also parallels John 17:3 so clearly John is taking from what Jesus said, he’s not saying something different.