Imagine a universe that is perfect. Can it change? Is change part of perfection? If it doesn't change, can anything in the universe admire and recognise its perfection? If it isn't the entirety of all that is, is that then not really the universe?
Let us pretend that change is required for the universe. The next instant of time the universe is different in some way. That change can be compared. If the universe is better, then the old universe was not perfect, it was imperfect. At some point the universe will become worse. In which case the previous universe can't have been perfect, as a perfect universe would not become imperfect.
So the universe cannot be perfect.
Perhaps the room you are in could be perfect. Imagine the room you are in is perfect. As soon as you open the door, the room next door can now affect the room you are in, for better or worse. It could before too, but now it is obvious. If that room next door is not perfect, then your room is not perfect. Any system (such as the room) that touches another system measures its perfection in the sum of the systems, not the parts. Hence the universe is the place to start, hence if you can only see the universe from outside, then that observer is affecting the perfection of the universe... thus is part of the universe.
So perfection and change are not compatible.
I change. From the moment of conception to the moment of death is a long series (I hope it's long) of changes. Each one of these means that no single moment is perfect. But are they good enough?
Even at the lowest of the lows, the worse of my worst, I have learned and grown from them. Even if I failed to do so and just become worse and worse, I have the opportunity to choose to change into something greater, something better. I can chose to improve. I can learn from each horror, grow from each failure, and evolve from each mistake. That means that each of these lows and worsts is but a part of my being, a part of growing a part of becoming. They are not a mark of my lack of perfection, but a mark of me being good enough.
I have had some horrid experiences in my life. Quite horrid. They are things I use in my life now to help understand others. Thus they weren't useless horrors. They have been used to make me a better person. Not perfect, just better.
At each moment of my life I have been good enough. There is no point that I can look at, place my finger on my time line and say "there - that is where I wasn't good enough". I can merely say "there - I wasn't choosing that bit" or "wow - I learned a lot from that experience". I was good enough, despite the horrors that happened or the mistakes I made.
The only times that I can rightly look at my life and decide that it was bad is when I look at an experience and think "I can learn nothing from that". So far I have yet to do that. So there is no waste of my life, there is only experience that I can use to make improvements on now, to help me create a path of my improvement. And that is good enough.