It's not done yet.
As a much slower writer than you are, no apology necessary. 😉
No apologies needed! I am here for what's next, whenever it arrives.
Take as much time as you need, you needn't ever apologise.
I understand what you mean about middles though, and especially being a middling reader. I suffer that too -- I love the start of books, the unknown, the pace. The ends, too. The middle is where it's trickier.