It is a very good thing that you are able to recognize that you have feelings underneath the surface. You went from repressing the feelings almost totally to recognizing that the feelings are there. It's great progress!
You are making a big assumption here- that these guys have any insight at all in their behavior. They are not like you or other people, who are willing to seek help and see that the problem is bigger than they are. That is a sign of health. These guys do not have that. They only way they will ever know they did wrong is if they are caught and punished not by their own conscience, but the legal system.
Both of these guys are in the same category. The mean one is probably the most mentally ill, though. Just participating in such an attack takes a certain level of cruelty so both men have issues beyond what a normal person would. Just think about the men you know now. Could you imagine them participating in something like what you went through, even if they did not participate as much as their partner?
It is hard to tell what is wrong with the guys that hurt you. They most likely were not born that way and were probably abused, but the way they reacted to the abuse is abnormal. So most likely it was a combination of their personalties and the abuse. Most people who are abused to not react like they did. Here is something that may help you:
Also, you need to consider that help was out there for those guys. They could have reached out if they were so hurt. You did. But they chose to hurt you instead. They were adults at the time of the attack and had choices. They were no longer being abused so they could have chosen another path and dealt with their pain another way. That means there was something fundamentally wrong with them. They may have started off as bullies when they were children and escalated from there. When someone has that much practice at hurting others, they become proficient at manipulation and vulnerability.
You have nothing in common with those guys. They may have gone through a bad childhood, but that is the extent of the connection. Many people go through abuse as children so you have that in common with millions of people.
These guys did not lash out in a normal way. It's not like they were frustrated and decided to take it out on someone. Their minds do not work the same way as normal people. They may have a mental illness, but there is a missing component, a self centerness that makes them see other people as potential victims rather than humans with rights. They probably see themselves above others.
Using sex as their tool, the idea was to dominate, cause as much pain as possible (hence the bottle) and humiliate you. Men are often turned on by domination (it is all through porn and sex books) but they do not go out and hurt women to the point of almost killing them. These guys are not normal though. The more they could hurt you and dominate, the more they were turned on. But since you did not have a choice in what was being done, the only consequence to you was pain and hurt.
Anal sex and sodomy are technically the same, but the term anal sex implies mutual agreement and sodomy is more the legal term for anal sex, indicating the anal sex was against someone's will and therefore was a crime.
This is not about you feeling sorry for them and understanding why they did what they did to you. Forgiveness may be a goal. But Linda is right, working through your feelings first would help. God would have the power to help you forgive if it's important to you to do so now. But forgiving them should be for you as a way to put this behind you. Not for them. God will deal with them.