Max’s pirate comedy “Our Flag Means Death” felt like a pretty standard spoof of pirate pop culture when it started its first season, but it developed over that 10-episode run into something much richer, smarter, and even moving by its end. As it navigates the tricky waters of streaming comedy in the 2020s, David Jenkins’ show has found a very loyal fan base; one attracted to both its smart sense of humor and its notable representation of LGBTQ+ characters.