I still wasn't a bad idea to kill nuclear in Germany. It is pretty expensive, admittably partly due to regulation, but also because of unsolved problems. Additionally we would have to ask Plutonium-Putin (No, we do not use plutonium-reactors)for all his good stuff and people would have cried again. There are still active NPP in Germany, but overall you cannot really say the decision was bad.

Yes, there are new coal powered plants being build, but mostly to replace inefficient older ones. There might be an argument that a new NPP would have been a better solution, but it wouldn't have worked out economically. Maybe with taxes on carbon dioxides if that would have been implemented.

I think subsidies for renewables are a far better investment compared to NPP.