The right thing to do is what enables you to live your life.
It is your choice but I would be worried from these posts that you have a very unrealistic idea of what will happen and how much new trauma it could inflict on you. It's not that it's upsetting, it's that it is traumatic. It can be more traumatic than the original abuse because once you are left feeling that even the police don't keep anyone safe, trauma becomes almost insurmountable.
When you report a sexual offence the police investigate you before they even consider recording the person's name, let alone interviewing them or investigating them in the same way as they have you.
That means your private information being accessed, your medical records trawled - especially mental health records because being traumatised by what happened will be considered to make you less "credible" rather than taken as evidence you had experienced trauma!
They will not record anything to act as an alert.
They will rip through your life treating you like a criminal and most likely never subject your abuser to even a tiny fraction of the same.
Speaking from sad experience of having my life destroyed by the police because I believed I was doing the right thing and desperately wanted to protect others.
I thought it would allow me to move on. I felt the way you've described.
Reporting - in the expectation of the police treating me decently, and being interested in protecting other people - is one of the biggest mistakes and regrets of my entire life.
I protected absolutely nobody and destroyed my own life.
The right thing to do for any survivor/victim of abuse is to take care of what they need. If that is reporting then fine, if it is not reporting then also fine.
The only person who has done the wrong thing in this scenario is the abuser, and everybody suggesting victims are doing the wrong thing by not reporting should take a long hard look at themselves. No, a victim's priority is self-preservation.
If the police were effective as a protective service that person would not have become a victim in the first place. It is sadly a fool's errand to report thinking the police will protect others. That is not what they do.
Every single survivor of abuse that I know regrets reporting. Some of them made it to trial, some of them saw their abusers imprisoned, the vast majority never got further than being re-traumatised in a police station.
All of them regret it. For those beating themselves up for not reporting - don't. You have done what you needed to do to survive and that is the right thing. The only person who deserves blame and judgment is the abuser.
Reporting is not a magic solution that frees us from the trauma of the abuse. The opposite.
Whether we report, whether we don't, we all beat ourselves up - that is the trauma and if we want to live better lives free of trauma what we need to do is start being kind to ourselves instead. Reporting or not reporting won't undo the trauma, but
treating ourselves differently can heal it.
Every time you beat yourself up you are continuing the abuse perpetrated against you. Learning to be compassionate instead of continuing what your abuser started is what allows you to recover.