Nick went back to the past in order to save his girlfriend's life~ The girlfriend was resurrected, but they were living in despair. So Nick went back to the past for money and position, and ended up losing his girlfriend. In short, there was no ending that satisfied him~ In the end, he had a car accident to save his girlfriend~~
He always wanted to use his own abilities to make everything under his control, but the results were always unsatisfactory. In fact, Nick, who has the ability to travel between time and space like a god, is just a mortal man with all the desires of ordinary people. I want to make everything perfect, but perfection itself is flawed. No one can override the law unscathed~~ The realization of all wishes requires the exchange of something equivalent to it.
So don't expect to be in control.
I personally think that the butterfly effect is actually telling us that there will be gains and losses, so it is better to hold on to the present if we hope to travel through time and space.
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