surprises and events that sometimes we wish we can change

Indeed, we all have made mistakes or suffer bad experiences that if given the chance, we would change them without thinking about it, but perhaps, its better to not have a perfect life and go through mistakes and failures, otherwise how would we gain new knowledge and discover new things if not by trying and failing multiple times?

For example, in the case of the bad experiences you had, I am sure you learned a lot from them.