The financial structure and the budget are a joke! Modern military in a highly developed country costs a lot more than we were willing to spend. Abolishing mandatory military service, creating a culture of anti patriotism and a society that is so spoiled by peace and economical power that it looks down on anything military related creates exactly this situation. Our military is in absolute shambles and it's hardly a surprise, it's systematic failure over literally decades. Our left leaning course over the last 20 years adds to that as well - we were naive, as we thought the US would always guarantee european security. But now that the day has come, some really are surprised that we lack military power. It's unbelievable, really. I am quite furious, honestly. We did everything to dismantle our military and now we see the results: being toothless. And make no mistake, even if we triple our budget, we won't become a military power over night. These things take many years to actually work. In the highly unlikely event that society AND the government actually realises this crisis and we start spending much, much, much more, we will still need around 3-5 years to have a considerable force.
Anecdotal example: around 30-40% of our military helicopters are actually ready to use. It's just one number but it represents the problem as a whole. Our military is absolute shit and will always be. We lack qualified personnel (no one who's highly qualified wants to join the german military bar very few example in the highest command!), functioning equipment, modern equipment, social recognition and - don't get me wrong on this part - military pride and identity. The historical break after world war 2 and our very important and absolutely necessary Erinnerungskultur has made it so we think more about after whom our military bases are named after but how they are run. Our military has no real identity, as any identification with our former military will only result in public outrage.