Disagree scripture makes the trinity clear.
To assume that the early church was in the dark is an assumption.
Scripture does not make the trinity clear. Reading scripture with the supposition that there is a trinity reinforces erroneous ideas but that's not the same thing.
Again the modern trinity theory wasn't officially recognized as "truth" until over 300 years AFTER the death of Christ. This should make it evident that it's explicitly not clear in scripture. The test is what did Jesus believe?
Joh 10:30 I and My Father are one."
He doesn't say "I and my father and the holy spirit are one". Never.
What did Paul believe? In virtually every one of his epistles Paul sends a greeting similar to this:
Gal 1:3 Grace to you and peace from God the Father and our Lord Jesus Christ,
Never a greeting from the holy spirit....which if it IS a separate God and part of a trinity would be a horrendous slight.