For me, regret not taking a risk and fail to win a life changing amount is more painful.
Because as time goes by we will forget about our losses on gambling, and I'm sure all gamblers also don't want to remember about that.
But the regret of fail to win big money/life changing money will never be forgotten, we will always remember it - that's why it hurts more than losing because of taking a risk.
but is the opportunity to win a sum of money that can even change your life guaranteed to be obtained? we know that winning in gambling is not certain, let alone winning a sum of money that can change your life (a large amount) but with a small win it is sometimes difficult to get. regret for having done or whatever it is can be forgotten but in my opinion what is clear is that there is no point in regretting something that has happened especially in betting like this it will not change the situation for the better.
I don't think to regret anything, including failing to win big money / money that changes your life. we have to keep thinking ahead because there is no point in remembering it, although maybe occasionally remembering it but don't let it make us want to take revenge and make us bet blindly again. so in my opinion it is better not to waste time regretting it because it can trigger our own feelings and can make us lose control of ourselves. do gambling properly then everything will be fine.