It would be a great help if you could make the meaning of the phrase "down in the mud" clear to me in the following text:
Right, he’s got a long way to go. He’s a bounty hunter, so he’s down there in the mud. Much like westerns and samurai films, the show is about characters who are surviving while surrounded by people who aren’t necessarily the nicest – and dealing with situations that threaten to compromise their integrity. Watching them grow is baked into the western tradition.
The text is from the description of the show The Mandalorian, which is the first-ever Star Wars live-action TV series.
Thank you for your time.