That’s interesting that Philo had “acquired”. Philo didn’t read Hebrew, so I wonder where he got the reading from, as it was before Jerome and the other non-LXX Greek versions were produced. The quote also says “God” rather than “Lord”, I wonder if that’s significant.
As it is, “acquired” is arguably closer in meaning to “created” than Jerome’s “possessed”, in the crucial sense that an acquisition is a point in time, whereas possession is a state of affairs. The accompanying “first of his works” and “founded me” also point toward God creating wisdom before anything else.
JWs agree that the creation of Jesus was different than the rest of creation because Jehovah created Jesus directly whereas he created everything else through his Son.
The point of the quote from Origen was to show that he held a similar view about God first creating his Son, as personified Wisdom, then created everything else through his Son. You seem to be saying that because you consider Origen to be a Trinitarian it is therefore not legitimate to quote him when he agrees with JW understanding on a particular issue. That doesn’t follow, and the weight of the evidence is that Origen differed significantly from fourth century Nicene Trinitarianism in any case.