It's a feature and a bug. A bug because it doesn't take anywhere near half the country to block something or push it through. A vocal minority or well-funded politically connected group is all it takes. Refer back to my net neutrality example. Polls generally showed a significant majority of the public was in favor of net neutrality, I've seen polls peg it anywhere from 57% to 83%.

Popular policies around the issue created by legislative statute instead of agency rules would have been a lot harder to repeal.

It's not about "half the country hates it", though. Plenty of projects have widespread support, but are only backed by one party (or no party). It's clearly a bug, as it causes undue preference for the status-quo above and beyond the popular will (and the common good).

One entire point of government is to work on multi-generational projects — like nuclear waste storage.

Maybe there would be tangible progress on waste storage/ processing if government set standards and then got out of the way. That seems to be working in the area of space launches.

something half the country hates can be good for the whole country. think COVID vaccines and lockdowns

Like the lockdowns did jack. Just look at the numbers and the spread of the virus with lockdowns in place. Hell, look at the Chinese in lockdown still today. Lockdowns were all political and crushed a huge portion of this country that the one voting party didn't like.