How is it possible that I willingly went right back into the fog and buried my head in the sand for almost 2 years? Ugh.
To answer your question: wishful thinking, he’d made some progress, keeping your family intact, you still care about him, concern for his ability to be on his own, fear, obligations, guilt (FOG)—or some combination of these factors.
Don’t beat yourself up about this choice. You gave him the opportunity to step up and he hasn’t, and things are nearly the same, with some minor improvement.
You are now at the point where you are assessing what the next steps are for your daughter and you. Certainly the pandemic complicates things, but it’s a good time to get your ducks in a row for the next phase of your life.
Why not head over to the legal board and post questions about alimony there. It would be ideal if you could get a legal consultation, perhaps through Zoom or over the phone, as laws differ from state to state.