I don't think it is obvious that the illegal deck hurt the OP. If this was NBN for example, making it that much easier to find those Astros could give you an advantage.
I think the fact you are posting here means that you feel bad about this because you know you had an illegal deck. Thus, really the only option that is reasonable, and will give you closure, AND make sure all your local compatriots understand that YOU understand that this is not something you are hoping to repeat, is to forfeit your winnings to the best of your ability.
This happened to me a while back. For some reason my deck was short one Clone Retirement, and I figured it out after I got home. I asked the tourney organizer to rework the stats assuming that I had lost all of my Corp games. It resulted in one person moving into the prizes and me moving out of them, so I contacted the guy who moved into the prizes and gave him the store credit that I won.
I now do the 7 piles of 7 thing before every tournament (and usually before casual games too).