This was intentional. Micah is antagonistic towards you from the get-go, Dutch begins to turn on you while you start to agree with Arthur (Dutch sounds less reasonable etc) . By the time you get to the island you are meant to be frustrated, tired from trying to "just finish the damn game" and you're stranded with the 4 people you (the player) like the least - right after at least 2 of them bungled the heist in Saint Denis that got you in this mess. All the levels are just shooting gallery type beats to vent your frustration. There was a video on YouTube about emotional manipulation of the player that was a great write-up about this phenomena in RDR2, and why the ending mission American Venom feels so cathartic.

Edit: I actually found it! "Should Games Be Frustrating". The first 8-9 minutes are largely Red Dead 2 and trails.off with that theme of using frustration to funnel player emotion, so I dont think you need to watch the whole thing.