I liked the game. I feel that video games are becoming less "game-y" and are figuring out how to create experiences that aren't just some mechanic repeated until it get bored with itself. Maybe if there was a way to telegraph "If you come in with these expectation you will be disappointed" however, I feel that it is the fault of the buyer in most of the cases. Proteus has been reported on fairly conclusively that this is not a traditional game and if you did as much research as watched the trailer you would have seen what you are paying for. Examine for yourself if the game is an experience you would like to have and then make your buying decision, don't just buy a game because hype.
I kind of disagree with "Masocore Indie Platformers" being a bad trend, considering the examples provided either weren't that difficult (Snapshot) or the difficulty was one of the main design choices (Dustforce). I also think that "Assassin's Creed's Decline" is a weird option for a "trend" because there were only two bad (main) assassin's creed games.