Victims of crime should be allowed to choose a punishment for a person who offended against them

I do not agree with this. If a victim would choose the punishment for a criminal the victim would most likely choose a punishment that is far worse than what the criminal deserves.

Bad idea. No saying they'll do the just thing, just whatever will satisfy their emotions and desire for revenge.

Male victims=MASS SUICIDE
Male criminals=MASS EXECUTION

Female victims=HELP
Female criminals=SCOTCH-FREE

I understand that victims of crimes suffer from trauma and are rightfully angry, but the problem is that most countries have laws that ban punishments that are too cruel, slow, painful, messy, etc.

For example, in my inicial country, the United States, we have the 8th Amendment, which prohibits cruel and unusual punishment. Many states in modern times seldom execute criminals, even if they do unspeakable things, and the ones that do often take years, even decades, to execute criminals on death row. And of the notable execution methods that I've heard of being used in the last century (lethal injection, electric chair, firing squad, and hanging), the only execution method I can think of that is still used in U.S. executions is the lethal injection. I can assure tu that if victims of crime, especially rather violent and horrible crimes, could choose any punishment they wanted for the criminal, it would be the slowest and most painful one possible.