Yes sure. For German articles please use google translate.

1. a) 0 Universities among the top 10: https://www.timeshighereducation.com/student/best-universiti... (In most other rankings, German universities rank much worse)

b) sinking high school performance: https://www.oecd.org/publication/pisa-2022-results/country-n... The collapse coincides with the arrival of refugees under Merkel....

c) Many immigrants in school. Hint: You can't teach math or chemistry if the majority of the kids don't speak German https://www.spiegel.de/spiegel/integration-an-manchen-schule...

2. a) Currently don't find a better article. Biggest problem compared to China. Germany has the same tracks for bullet trains, local trains and freight trains. Often the bullet trains run a 120 or 160 km/h https://www.businessinsider.de/tech/warum-es-ultraschnelle-z...

b) Switzerland complaining that German late trains destroying their time tables: https://www.focus.de/finanzen/news/schweizer-experte-droht-d...

3.)

a) Waiting for several months (around 6, based on own experience) to see a specialist: https://www.sr.de/sr/sr3/themen/panorama/saarland_warten_auf...

b) Retirement, as percentage of former income, EU comparison: https://www.merkur.de/leben/geld/deutschland-rente-vergleich...

Forgot the last point:

4. Examples https://www.bw24.de/baden-wuerttemberg/neid-debatte-vermiete... https://www.deutschlandfunk.de/fluechtlinge-dubiose-geschaef...

And personal experience from friends of mine who are landlords.