Based on these odds you believe that practically everyone of your ancestors have been condemned to hell. And, almost without doubt, you are going to hell.
All I can say is, speak for yourself.
I'm sure that when St. Leonard of Port Maurice gave this sermon there were large numbers of people who reacted exactly as you have done, "Speak for yourself." But by doing so, weren't these people placing themselves among the number of the reprobate, and weren't they demonstrating the very lack of remorse and fear which the saint was deploring in his sermon?