Chiming in very late here, but I am firmly in the
@grebe camp. Top set vs nut flush is just an unavoidable disaster. On nights like these, we go broke and we say to ourselves something positive like "at least this didn't happen to us on the money bubble."
I can't underscore enough how being worried about a stronger hand than top set will lose us a TON of money/equity over the long run. We know that in this specific case, it led to a short night at the table, but we (hopefully) are playing poker to improve and be profitable over the long run right? We are not just thinking about how short/long we play on any one specific night but are instead curious about what plays allow us to be at the tables longer over the span of many years (maybe a lifetime?).
Top set in a rebuy structure is always going to lose all (or nearly all) of his chips in these spots. Let's focus on maximizing gains when we flop top set instead of minimizing loses - I promise you this will lead to more chips over the long term. Having said that, there is plenty to zoom in on and play differently next time:
1. If blinds were really at 25/50 and villain raises 8x pre, that should just trigger and internal alarm which says "this player will often have a big hand here... maybe AA, KK, QQ, JJ or AK, AQ". When villain makes it 8x pre, I think flatting the raise is totally fine and might be the more profitable play (it's close). To a normal raise (2-4x the bb), I would be looking to 3bet. This in itself can be great insight if you can tell that it's somewhat reliable information.
2. Once you just call pre, the entire hand will play differently of course. You will still most likely lose it all, or close to it, but villain might end up leading out on the river instead, at which point you can just call and maybe save yourself a few remaining chips (again this should not be our goal but it ends up being a somewhat positive outcome).
Whatever you do, don't feel like a "donkey" for playing it the way you did. There was nothing wrong with your play, just unlucky. Keep focusing on bet-sizing moving forward, that should help. Thanks for sharing.