"Were she better, or you sicker, then the stars would not be so terribly crossed, but it is the nature of stars to cross, and never was Shakespeare more wrong than when he had Cassius note, ‘The fault, dear Brutus, is not in our stars/But in ourselves"
Peter was saying that the fault is in the nature of things..not in how you do them, or even just in yourself generally. This becomes important because it was “fate s fault” when Augustus died, not Gus’ fault. So therefore, the Fault is In Our Stars, and we can do nothing about it. We don’t have a choice in the matter.
You don’t have standards you have a wish list and you haven’t learned to parry it with reality.
Expecting somebody to perfectly fit your exact tick box/wish list is what Disney/romcoms have falsely taught you to expect from love. Find somebody to build a mould together with as you go along; don’t try to shove others into an unrealistic/unattainable mould.