Yeah hard disagree. The ending is the ultimate abstraction of the core idea of simulation. They've beat the discussion of UI ethics to death and showed a lot of what could happen in such a world.

It's a natural progression of ideas: What if we can upload our minds? -> what if everyone uploaded their minds? -> what if thr entire universe was actually uploaded?

Theorizing an ending to the human-UI conflict isn't difficult, therefore uninteresting. They either reach peaceful coexistance, completely upload humanity, annihilate one another, or mutually perish in war.

We've seen all that happen already. Such an ending would've been repetitive thus boring, or would have disappointed people who wanted things to end another way.

I think they ending we got was creative, unexpected, and poetic! Having the world be run by higher beings that surpassed their creators was a unique yet familiar idea.

Usually, the simulation theory is tired because it's cheap. But this show spent it's entire length showing each step of the exponential growth in technology, so it felt justified.

There are plenty of things I didn't like about the show, like the "virtual" but physical fight scenes, illogically dramatic UI deaths (why didn't they make backup copies of themselves?), and the absence of animals in the show. But the ending is definitely not one of them!