This is not really as one sides as people here trying to make it be.
> Usopp about to attack ulti, but Page One interfered
> Usopp about to attack Page One, but Ulti interfered and attacked Usopp instead
> Usopp about to attack ulti, but Page One interfered
> Usopp about to attack Page One, but Ulti interfered and attacked Usopp instead
For you other parts I don't disagree topi, I just think if Nami+Usopp round 2 vs Ulti and Pageone happen later, I think both getting a powerup+ getting help of someone else to beat them. Similar as Luffy need help to beat Kaido, similar as Sanji and co need help to beat the calamity.
I don't disagree your point, Kinda even have the same opinion(little different though).