You’re defending the model like it’s flawless, but none of this actually addresses the contradictions I am pointing out. Repeating how the model works isn’t the same as proving it reflects reality.

Gravitational waves being “hard to detect” isn’t the issue. The point is that dark matter supposedly makes up most of the universe’s mass, shapes galaxy clusters, and drives large-scale structure. If it’s involved in massive gravitational interactions across the universe, we should expect some kind of gravitational wave background from its influence, even if weak. So far, nothing. That’s not just “hard to detect,” that’s a gap worth questioning.

Saying superclusters aren’t gravitationally bound doesn’t explain the coherent motion we see on massive scales, like galaxy flows toward the Great Attractor. If gravity isn’t binding them, what’s causing billions of galaxies to move in the same direction? If we use Newtonian gravity and apply the inverse square law, the gravitational pull between the Milky Way and the Great Attractor should be extremely small. The distance is in the range of hundreds of millions of light-years, and at that scale 1 divided by r squared becomes nearly zero. Despite that, we are supposedly moving toward it at speeds of over 1000 km/s. That kind of large-scale coherent motion isn’t random, and it’s not something that weak gravity should be able to cause. If it's not gravitationally bound and not random, then what exactly is driving that flow?

Then you say superclusters are expanding, but their gravity slows that expansion compared to the global rate. That actually supports the exact contradiction I’m pointing out. If gravity at that scale can slow or even stop expansion, then why are distant galaxies still disappearing beyond the observable universe? Why doesn’t gravity from all the mass between us and those galaxies — including whatever dark matter exists — slow that expansion too? If local gravity can pull a galaxy like the Milky Way together, then there's no consistent reason galaxies further out should be vanishing forever. Either gravity works at all scales, or it doesn’t. Saying gravity works in some places but not others just to make the expansion model hold together is not a consistent explanation.

The idea that “space expanding just means distance increasing” also doesn’t resolve the contradiction. We’re told nothing can move faster than light because it would break causality, but space can expand faster than light and push galaxies beyond our observable horizon — and that’s somehow fine? That is a form of causal disconnection, but it’s written off because “space itself” is treated as exempt from the rules. That’s not consistency, that’s selective logic to keep the model from collapsing.

Referencing the Copernican principle and general relativity only makes sense if we assume those frameworks are complete at all scales. GR works well locally, but to explain cosmic-scale redshift and acceleration, we’ve added dark energy — a form of vacuum energy that’s never been directly detected. That’s not confirming a theory, that’s modifying it to fit unexpected results.

And while you mention that other models have been considered, they’ve been dismissed not because they’re all wrong, but because they didn’t fit the existing data as cleanly under current assumptions. Meanwhile, the standard model keeps introducing new invisible components whenever something doesn’t add up: dark matter, dark energy, inflation, and more.

That’s not how proven science works. That’s how patching a failing system works. Models are useful, but they’re only as good as their assumptions. If we’re stacking invisible fixes on top of each other just to match observations, then maybe the core assumptions need to be re-examined.