Jen - we could be soul sisters! Your story is similar to mine with a few minor differences. 1) He did 15% which included all the things he liked to do like grilling and cooking meat dishes. I don't miss him for taking the trash out or doing work around the house because he never did them anyway. Love the term "weaponized incompetence"......I use the term "learned helplessness when convenient." 2) He NEVER once said he wanted to make things work. I realized later that he had emotionally moved on and didn't have the courage to end this himself.
Don't ever feel guilty for what you did, because you did the right thing. It is better to be alone than be with someone and feel alone. I was bogged down by all the work that I had to do and still am, but at least I don't have to deal with the idea of having a partner who wanted to be treated like king.
Tom said it best (below). It will get better with time, with relationships, and definitely with kids getting older and needing to do less for them.
Yes, it will help to speak to a therapists to just process the grief, the loss of something that was supposed to be forever, the anger and all other emotions. Allow yourself to feel and to cry. Hang in there! Hugs!