How much maintenance does your garden or /fish pond need?

My pond is about 2 meters (6 ft) deep, and 3 meters (10 ft) in diameter with about 30 goldfish and shibunkin and bullfrogs.
I have tried to automate as much as possible with: automatic water fill, water temperature control, aerators, filters, feeder (when in season), UV water purifier, and skimmer. Yet every time I look away from it for a day there is something that needs to be done. A tree branch has fallen into it; leaves have blown in and clogged skimmer; a raccoon has played with a couple of solar lights and tossed them into the water; a heron is trying to eat my fish; etc. I was just away for two weeks in the dead of winter and when I returned I was greeted by a dead mourning dove half floating on the semi-frozen surface. It is endless.

The grandkids love feeding the fish. It is a beautiful, rustic feature and I do get joy out of watching the fish grow and their response to my harmonica and voice. Also, taking care of it is probably good exercise for my body and brain.
But, I’d be lying if I said I never had the urge to just fill it with 6 yards of concrete and turn it into a base for a wind tower.

If you have a pond do you have the same issues? Do you sometimes want to just fill it in? Do you hire someone to take care of it?
What has been your experience?