It sounds like you have been through the wringer this week. I can relate to a lot of those feelings too. D16 hasn't spoken to H since August. She is extremely detached and says that H must be accountable or there isn't any reason to talk. Very black and white. I must admit I admire her conviction.
What can I say that you don't already know? You have much to be proud of and time will help give you strength.
As for the work situation I am in a very negative work environment right now and it sure taps your mental and physical energy. Try to keep the boundaries clear and take care of yourself personally and professionally. If you are true to your morals then you will be able to look at yourself in the mirror.
Sending you good vibes Matt.
PS - D19 also brought friends home last weekend. I can totally relate to your life with your two girls. My H just walked away after 25 years. Being present and showing them they matter is huge. Hang onto that because it is, by far, the best legacy you can leave to these two young women. You have my admiration and respect.
M:25 years at BD w/ 2 daughters BD: 5/14 Separated 6/14 - H moved cross country w/OW D Final 9/17
“I can be changed by what happens to me. But I refuse to be reduced by it.” ― Maya Angelou