OK, I am going to go against the tide here. I know what I say could be terribly wrong, so please read it with that awareness, but this is how I see it from my personal life experience.
I have thought, if not said, all those things you posted TCD saying and feeling. I have had more than one person tell me they can see why I feel like a universal whipping post as my life does look that way, it really does. I do not say those things because they are far fetched and I am just trying to get attention, I only speak what I feel is truth and I do not speak of it often, I keep most of these thoughts inside and under lock and key as I do not trust others reactions to them.
When I do share them, I am doing so in a serious way of reaching out to be understood. I may feel like being "gone" would be better than the pain I feel, but I would never do what was necessary to "go" because I am way too responsible for that, I may have my flaws, and have screwed my kids up in other areas, but I would never purpose to inflict that kind of messup on them, or my parents for that matter, so in reality those "going" statements are feelings, not true intent. (of course TCD may be different in this regard, and it should be taken seriously).
If my H were to call 911 when I was in one of my down times I do not know if I would be able to forgive that, I would see that as a betrayal-one that would be the "one and done" kind, which obviously the infidelity was not the deal breaker, but this would be (this is me, TCD may see it differently).
When I am in this frame I am reaching out desperately to be understood, and to have my life seen clearly, not with pretense or what it should be, but the stark nakedness of what it really is.
I sooo want to feel I am worth the effort it takes to understand another and that someone actually desires to do that (not someone who gets paid to do that).
I do believe you are fully "awake" to your role in her "whipping boy " status, but do you really understand what that means to her? Do you really see what she is trying to convey? It is kind of like love languages, you may be putting in the work/effort in physical touch, but she is a words of affirmation gal, so the hugs and the touches are not reaching what she needs to feel your understanding.
The few times I have felt "understood" have been such amazing things, even if it was just 1/100 of understanding, it was sooo much better than being alone in misunderstanding.
I wish you both the best through this and I realize that I may be way off in how I perceive this issue and do not want to dissuade you from going down the "professional" route if that is what is needed.
Grace
ETA, Reality has much insight IMO, perhaps read her responses again.
[This message edited by GraceisGood at 3:35 PM, October 2nd (Wednesday)]