I agree with most of your points. Germany is still one of the world's greatest scientific and technological powers. Taken as a whole, Germany still produces a large number of the world's most important scientific and technological breakthroughs.Germany with on the cutting edge of Industry like Siemens, Bosch or in software industry like SAP, Or in Biotech BionTech ( MRNA Covid Vaccine) is less useful than India with 50% people still working in Agriculture and no world class company? Hahaha. You live in Fantasy land it seems.
Germany may have declined but it still a huge force in the world of business and industry. To dismiss Germany just because you dislike its recent political or geopolitical decisions is foolish at best.
India has nothing going for it except a huge population for the world to sell to. That's the only reason companies invest there, to sell it more goods. What is India selling to the world?
Again Germany US or the west in general maybe in decline. But that doesn't mean they are not on top of the world. They are still on top. China is gaining massively each year. But its still too weak to fight the west. Its industry is still maturing and moving up the value chain. Its technology is still in catch up mode. Its financial system still not mature enough to open up.
These are the things China itself says about itself. That it still has long ways to go towards economic number 1 position. Using GDP PPP to try to make China number 1 is just boasting or posturing. This is what India does to try to make itself SupaPAWA.
Judging by this list, China will have an extraordinarily bright future, but we shouldn't pretend that Germany isn't doing exceptionally well with only around 80 million people. Germany is a world-leader in scientific instrumentation (especially microscopy and electron-beam lithography), optics, robotics, pharmaceuticals, power electronics, chemicals, and other highly-important industries. Germany's software and high-end semiconductor industries are laggards, but that doesn't change the fact that Germany is still one of the world's most important industrial powers.
What does India have? Is there anything that India provides to the world, other than billions of lines of substandard code and millions of nepotistic employees, that cannot be provided by other countries?