Welcome to the forum. Love the happy dog pic!

Is the pond only fished from the shoreline? Can/does anyone ever put in a boat?

One inexpensive fix that might help YOUR bass fishing is to add some structure offshore of your lot. That will help to concentrate the bass and help the bass more efficiently ambush their prey.

Lots of common carp will muddy the pond. The reduced light in the water column will hurt the production of the tiny food sources at the bottom of the food chain that eventually feed your bluegill and bass.

I would certainly take out every carp that you catch. Also, during the spawn it is sometimes quite easy to shoot carp with a bow and reel combo. (That should be legal in Wisconsin?)

At other times it may become easy to angle for carp. If you chum an area for a week with corn and doughballs, then you and some buddies/kids might be able to subsequently catch 30-40 big ones on a single good day.

Good luck on improving your pond!