> It feels like we are in a weaker position then ever: militaristically,
> economically, scientifically, and so on. Meanwhile the threats of China
> and Russia and what could happen in the next few years are quite concerning.
On the other hand, it's not only USA really.
Russia with their czarist structure of power and control hasn't really had an economy that's more sustainable than USSR ever pretended to have, and their government keeps digging the country further in the grave as we speak. Russia can be a nuisance to its neighbours by their size alone but as their failing offensive in Ukraine shows they don't really give much to worry about in their peer countries of similar size and position.
Europe is running around like a group of headless chicken pecking eachother with minimal ability to make decisions cohesively and in unison, and many larger European countries are trampling knee deep in the mud when you compare to their heydays.
China is indebted, lacking energy, yet wants to expand their projection of military power but having enough to do with their current neighbours and desperately needing to maintain trade relations around the world means that, at best, the ruling party can only think about it. Unlike some other peer nation states I think they just might ultimately be wise enough to understand their position themselves, too, despite the desire to posture hard.
Further, I can name many countries that are, in relative terms, doing similarly stupid things now that they didn't do before and few that have actually managed to preserve some common sense but they're either small enough to not matter a squat on the global stage or they aren't interested in global power in the first place.
Not that USA isn't actively destroying the very relations that did help them extend their power across the globe cheaply through allies, working to weaken the dollar, and in internal affairs shooting themselves in the foot at a rate that could make even Russia jealous, but USA is still pretty good in comparison to their competition. There's no serious contender for USA at the moment and won't be any time soon even if USA keeps hitting even lower and lower bars of statehood.
I'm more pessimistic than optimistic about the future but the reason is that it seems the world as a whole has enshittified themselves down to a level that would have seemed even theoretically impossible by the key players only a few decades ago.