John 1 doesn’t teach that Jesus is the creator on any reasonable reading.
1. It says the Word was “with” God.
2. Verse 3 says God created “through” the Word.
3. The Word is described as “god” without the article not “God” with the article.
4. Verse 18 says that the Word is an “only begotten god”, not almighty God.
5. The rest of the gospel teaches that Jesus owes his life and is obedient to God, such as John 6:57.
6. Early interpreters such as Origen said that John 1 presents Jesus as a “second God”.
7. In John 8:58 Jesus was claiming to be older than Abraham and identifying himself as the messiah. He is not claiming to be eternal. In fact he elsewhere stated that he is not eternal. (John 6:57 and elsewhere)
8. I admit that John 20:28 is a problem and I don’t know what the answer is. But given everything else the book says about Jesus I just don’t think it makes sense to conclude that the author believes Jesus is almighty God.