We rarely see the past with clear eyes. Depending on our mood or outlook, we may see it with a pleasant sepia-tint that hides the harder reality, or we may overstate the horrors. How we look at our past is a reflection of who we are.
More precisely, it is a reflection of who we are at the moment.
As I look back I can see very little but misery. Try as I might, pleasant thoughts don't get a look in. That reflects who I am now.
At other points, I have been able to see and remember happier times and moments.
When I think of the past as miserable, I also see the future in that light.
What I see as I look forward and backwards is a reflection...of who I am now.
Tomorrow is another day.