Man rating a rocket
Sorry, but man-rating a rocket is much more complicated than we think.
Ariane 5 almost got to that point.
That would mean reliability increase to 99%, add far more redundancy, add a launch escape tower (and testing it beforehand) which will change the launch profile. Also, arrange for the engines to burn in such a way there's a constant 3 G acceleration (and not a peak at 5 Gs followed by 0 G like it's the case now). I forget lots of other aspects.
There is a reason why NASA's budget is high, but at least astronauts do get to space.
We're still waiting for a successful launch from them.