604 odds? Lol! Those are some crazy odds and you lost it because of bad luck op(Not because of greed).
I would say he lost it because both greed and bad luck because from his story, there was a time when he had to decide whether to add the last selection or not. He does admit it himself that it was due to his own greed but obviously regretting it will not change the fact that he had to lose the bet because he want some additional money by adding the last selection. He lost because of one game and that's the last game he added to his slip before locking in his bet. He had doubts of that last game but still went ahead to add it to his game and that's disobeying your feelings. He was already winning but added the game to get more money.
The OP was greedy and he has admitted it in his post that's why he titled the thread about greed causing losses and that's true because he was greedy and wasn't because of him having badluck. He has learnt his lesson from the mistake and in future will be less greedy.
Greediness makes you always wanting to have more and when you don't have a satisfaction limit to what you want, you'll always have a regrets like the OP. Let imagine how much he was about the make but his greed made it impossible fo him to win and he'll regret it for life.
