The problem this year that easily could have been avoided is the island. Seriously, why would you stick them on an island? All the great Real World moments include the conversations walking home from bars, the gym walk dramas, etc. If you want to invite someone back, you now have to bring them back on your boat, and then they're just stuck there? Unless they were trying to build the Always Sunny Implication effect, it's just a bad model.
And that's the only reason Trey and Laura keep getting together. Because there's NO ONE else around.
Yes, the cast sucks, but some of the best moments have been their interactions with non-cast members. Had we had more of that, than maybe this season would only go down as shitty, instead of top 5 worst.