well, that’s how you end up putting a pond in a super degraded wetland. If you have a place that is unusually muddy, you’d probably be better off doing some research as to what sort of wetland it may have been and trying to restore that instead. We had a similar situation on our land and how have a surprisingly large wetland with a bunch of native plants that is also used by animals including frogs. It has a little seasonal pool but is a lot more diverse than the ponds I see around here where people just dig holes in the ground where it’s wet.
That being said, the degraded wetland has probably been ditched, drained, etc so the process of restoring it might involve building small pools or ponds! It’s just best to mimic/repeat natural ecology because that’s what the species there are adapted to. In my case i attempted to mimic beaver dams plus getting the little seasonal pool which surprisingly has even been colonized by oarsman beetles and water striders! But there is more intact habitat not far away in this case.