Ancient greek's could surely measure some things, how else did they build those buildings?

You've declared we can measure everything important so reality is objective, but quantum physics suggests the things we can't measure may be astronomically large. The physicists who subscribe to the many world's theory believe there's a near infinite assortment of humans we cannot percieve or effectively measure, for example, and our own experience of self is inaccurate as we don't percieve ourselves to be branching in time.

I don't think measurements solve the problem of the uncertainty of reality.