This hive is being hassled by a skunk. The scratch marks and muddy calling card has skunk written all over it.
Notice how the scratch marks are at the entrance only. The skunk will show up every night at the same time and scratch the entrance. As the bees come out to investigate they become dinner for PePe Le'Pew. A skunk will depopulate a hive and it will become a very weak hive..
Another symptom of a skunk is the bees will be agitated when you work them.
Notice the grass beaten down in front of the hive.
Solution, fence out the skunk or get rid of the skunk.