No,you aren't the worst gambler (for now). You made a good decision to stop even though you already lost your 10 btc and still hold the rest (15 btc).
You and we always have the reason why you/we must continue this live, there are still your parents, your brother & sister, wife and your children (if you already got married).
Here is an example of a gambler worse than you, he lost 360 btc just in some minutes...
For every action, there is an equal and opposite reaction.
Unlucky for bettor, but really nice for investors. I believe house profit is possibly the highest it's been during the latest version, but don't quote me on that.
What a sad thing if you have bad luck when we play dice game, OP, life is the most precious thing, never end your life, you should be happy because you still have 25 btc, but more than 90% people don't have that amount.