The Big Win that I once got, half of which I spent on gambling again, I should have been able to use for something unexpected "like what happened in my life few months after my big win". But, everything has happened, and I have to accept that fact. Regret, of course there is. But let it be a memory and something I can tell to remember the times when I was actively playing slots and getting maxwin. Now, this must be a valuable lesson in life, not to be careless in using money to gamble if get a maxwin.
The main reason why half of your winnings got spent into gambling again is just because you looking for another big win that's why instead of using the money that you've won in gambling to buy things that are more useful, you've chosen to gamble again, but that is normal because most of the people who earn the money in an easy way also lost it in the most easiest way also. The main point of this is that once you've won big money in gambling just gamble the 10% of your winnings and if you lose then let it go maybe that day is not for you.