I guess the Supreme Court simply doesn't want to hear second amendment cases, for better or worse. Having lived in California (and recently) I can say that this is distressing. Depending on where you live in CA, getting a concealed carry permit can be as easy as any shall issue state, or the next best thing to impossible. Given that California bans open carry, many residents of California are facing a de facto ban on bearing arms, a clear infringement of the second amendment. I fully endorse the dissent voiced by Justices Thomas and Gorsuch, who called the decision "indefensible".
EDIT: And I thought that they were doing, a perhaps not great job, but an acceptable one. This is rather disappointing, especially since the court still has the same number of conservatives, liberals, and swing votes as it did for the McDonald and Heller decisions.