I finished mine in Sept, and caught great fall rains to get it 3/4 filled. Also gave me enough rain to get grass started everywhere. I was a bit on the lucky side though. Not sure we've had enough rain since then to get it half full.
On another note, I had a lot more rock in the soil/clay than it looks like you do. I've got a small leak, which bothers me, but not much. Hope you get your contractor situation resolved.
My builder wasn't a soils expert. He knew enough to know I had marginal soil with too much rock. When he found good stuff he did his best to get it in the righ places. I did make them use a sheeps foot roller. They didn't want to, and really had to fight it. Glad I did though, as I think my leak would probably be worse.

9 yr old pond, 1 ac, 15' deep.
RES, YP, GS, FHM (no longer), HBG (going away), SMB, and HSB (only one seen in 5 yrs) Restocked HSB (2020) Have seen one of these.
I think that's about all I should put in my little pond.
Otter attack in 2023