I travel to Germany and the Munich area a lot and I'd absolutely love to move there. The transport is great, efficient and cheap. The roads are well maintained and Munich airport is one of the nicest airports I've been to. The towns are beautiful, everybody cycles, there are nice restaurants and it's extremely relaxed.... You get the picture.
The biggest problem with the UK is it's extremely poorly regionalised. If you goto London then you see something that somewhat resembles the picture above but go elsewhere beyond the M25 and it can be almost 3rd world. The UK is actually a poor country but by statistics we're a rich country due to the concentration of wealth in the south. That doesn't mean everybody is rich in the south, it just means that's where our wealth as a country comes from.
To show the regionalisation problem, Manchester's GDP is £80bn which is absolute peanuts and less than 5% of total UK GDP but remember that Manchester is the 3rd biggest city in the UK! Manchester could be removed from the UK economy and it would make no difference. Pretty much every German city is doing far better than this, often double better.
However, look at London which has a GDP of over £700bn, this massively outpaces every European city by a huge margin. What we have in the UK is the most powerful city in the world whilst the rest of the country is far below average in comparison to the rest of Europe. This is pretty much why all of our infrastructure spend goes to London.
The rest of the country is built upon what came before, we have still have WW2 roads and railways but we don't have a WW2 era sized population... And we're drowning because of it.