Dear painfully sober friend,
It was painful for me to read your post. I am glad that you are putting the Yesod Yosef and R' Ahron Rotta's sforim on the back burner, for now. I am interested to know how long you have been sober for, thank-G-d, so far. It seems you are really working a Program. Yivorech'cha Hashem, brother.
Concerning your pain: if you work your program such as it is, I have faith that Hashem will help you and those siblings of yours. None of you may 'heal' in the way you want, but you will each grow in whatever ways He has in store for you. Perhaps all you can do is bear the pain while doing the very best you can under the circumstances, living the life Hashem is arranging for you. And 'doing the best you can' probably means staying sober and growing in humility, rather than in any madreigos, c"v. Lo sa'aleh b'ma'alos al bizbechi, asher...etc is very important for me to remember. All the more so for anyone with more kochos and good character than I have. You learn a lot, I don't.
Looking at yourself as scum is probably not humility. Perhaps you despise child molesters and see them as scum. Perhaps you fear that society feels such people cannot ever be forgiven. Maybe that's true. But as your friends have been writing above, Hashem seems not to see people that way. True, a murder with eidim and hasro'oh needs the tikkun of chiyuv misah, but I believe it is barur kachama that a murderer can still be chaviv and ne'ehav by Hashem. Even if he has to die. What's more, I believe that teshuvah enables the tikkun to really 'work', when the time comes. And as far as suicide is concerned, Hashem has that angle covered, too: we will all die, right? The question is do we want to 'do' the tikkun on our schedule - or on His=when the time is really right? Same question Odom and Chava had in Gan Eiden: keep the Odom the way Hashem made him and let him grow on Hashem's schedule (for another few hours)...or take matters (Da'as and the YH) into our own hands and let our anochius/ego lead the way?
Have you gotten up to step 8&9? You are all wrapped up in pain - when you make your amends to those two people you will all get better. Learning how to do that is what recovery will be about at that point in your life, and Hashem will help you out. If you are not at those steps yet, that's fine. Take your time and work 4-7 as thoroughly as you can. You describe how some of the pain you are feeling is bending you out of shape. That's what 4 is for. It's a character defect. It's a problem you've got. While you are certainly not scum, you do have some real challenges. This is what recovery is for!
That's why it's so nice to read that you are serious about being in recovery.
Living recovery and fitting teshuvah into your life is an adventure. It is amazingly interesting and there are surprises around almost every corner - mostly good ones.
Keep on going, brother.