> in an objective non political way
While your whole post implicates that you are leaning to the conservatice spectrum, I will try to be as objective as possible.
Germany has been ruled by conservative governments for the last 16 years. These governments have hindered innovation (see German internet speeds for example) and lobbyists made sure that nothing changed in regards of mobility, energy, city building and whatnot.
The russian attack on Ukraine has made clear that dependency on foreign states is not a good idea and that we have to act on that swiftly. Acting swiftly comes with a cost for the moment for sure.
Energy prices are already falling though for example, renewables are being build, probably like never before, see [1] at the bottom, and dependency on fossil fuels is being reduced steadily.
That could have been done slowly over the last 16 years, but conservatice politicians were busy doing... I don't know what.
Nuclear is and was never a viable option. While fans of this technology are repeating it over and over, the German reactors were EOL. Also: The energy companies were only able to run those reactors because that has been subsidized in different ways.
The economic downturn is somewhat more complicated, I think.
Lots of companies have used the pandemic to rise prices. While that might have been a real issue due to logistics during the pandemic, right now it's only greedflation with companies rising prices "because they can". That hits companies as well as persons and leads to people being more frugal and results in the economic downturn.
The "downturn" also might be a more realistic view of the situation, as the current government is not that leaned towards pampering businesses and lobbyists as the former ones. Former growth is in parts the result of subsidizing, tax reductions, low interest rates etc. These are all valid measurements to boost an economy, but someone has to pay the price for that.
Now, there's also a price to pay for modernizing the country at a larger scale and businesses have to pay their share, too. I think that's only fair.
[1]: https://www.bmwk.de/Redaktion/DE/Dossier/erneuerbare-energie...