The space marines had a good stewardship as a trait, actually. So that 2 isn't actually what they have.
A little hyperbolic, but yeah.
Ultimately, my point is that we knew the risk of this happening, and we chose to take that risk anyways when we could have, for instance, doubled back from Ascalon when we saw that the road trip was taking a long time, and then we wouldn't be in this situation where chance would have had this much say in the outcome.
I made a plan to that effect, too - The idea was to start exploring Denva's other neighbors in a breath-first approach. Lost by a landslide - we knew and chose this risk.
That's not sour grapes on my part to be clear. I wasn't exactly beating the drum about the risk during the plans since then - I was even mulling over "stay on caldereth" plans for this turn, I'm no Cassandra.
But I'm not going to say we didn't fuck up, because we absolutely did.