To my understand we are far more powerful than most civ's that have been run in the past. As seen by the fact that we could lose the entire population of many previous civ's, and have, without suffering or dying out.
There is also how much tech and resources we have access to, where in the past we might have been survivors barely powering a 3-D printer or a think-tank remnant struggling to take advantage of our tech.
The only reason that we aren't really powerful is because as we have grown, the threats we face have grown with us. Partly thanks to the QM balancing things and also because we have been less cautious and such thanks to our apparent strength.
As to making super soldier, we could make post-fall quality "super" soldiers, we can't really produce the pre-fall stuff thanks to lack of resources and such.
If we are going to make them, I have suggestions for some techs to pick up and other things to do;
1) Invest in a retro-virus carrier to enable genetic alteration to the super-troops. This will allow us to do some of the other suggestions more easily.
2) Find a bio-tech think tank and purchase off of them stuff like the genetic structure of enhanced muscles, eyes, bones, nerves and other such things.
3) Get the usual sort of tech's elites should have like cloaking, night(/heat/other)-vision, cybernetic enhancements, etc.
4) Provide them with enhanced training in regards to infiltration, demolition, firearms proficiency, interrogation, camouflage, melee proficiency and more or less anything else they might ever need.