1 John 1:8 “If we say we are without sin, we deceive ourselves.” There is a memetic inheritance which brings with our humanity some self destructive habits, so that by the time we learn to speak we are already being dragged down by the bad examples we follow. It is not about deserving. Do three-year-olds deserve to be hit by a car and die. This happens, and no doubt they were doing something they were told not to. But to say they deserve to die is insane. We learn from our mistakes. That learning is the essence of life itself. Philosophies which do not acknowledge this and have an anti-life demand for perfection is no different than other bad habits which are self-destructive in the way they obstruct learning.
To be sure we often whip ourselves with the memories of our mistakes. To the degree this helps us to change, this is a good thing. We most certainly should remember both our near experiences with death and the harm we have done to others enough that we do not do the same things again. But this can also go too far if we go beyond this to think of both ourselves and others as worthless because of our mistakes. The real measure of value in life is in not some unrealistic perfection but in whether we are learning and doing better. There is plenty in the Bible for a Christianity which reaffirms this truth and if your religion is teaching something different then you should really start to question where this religion is really coming from.