Planetside 2, I've played this game more than almost anything in recent history but its very hard to convince people that the starting weapons are some of the better ones in the game(tf2 style, everything is a sidegrade) and despite the weapons costing 7$ you only really need to every buy one per class(and most of the better ones cost less than 5$). So the game ends up looking like a bit of a money hole.
Skyrim, I love this game, its about a 1000x easier to mod(and keep stable) than any game Bethesda has ever made, but its also very dumbed down and you have to install something like SPERG in order to make perks interesting. Since its so dumbed down its also much harder to implement more rpg-like features into the game outside of say "Requiem" which is so incompatible with everything else you pretty much have to chose between it and other mods.
Android Tablets, I had a Galaxy Tab S and it kicked ass, except for the storage for a premium 400$ tablet 16gb of storage is disappointing especially since you can buy a 128gb microsd card for 60-70$. Also while lots of people are saying that "mobile games are the future" it was INCREDIBLY hard to find any that were worth playing at all. However it did allow me to play "monument valley" and that kicked ass.
Steam, I love you steam but greenlight is mostly a bucket of trash and I no longer even look at the front page anymore since its so filled with garbage.
Tutorials, tutorials these days have taken a major que from pop up ads in that they've decided to become the most annoying thing ever. Somehow these days its acceptable to have tutorials that stop EVERYTHING pop up on the screen and vomit text on you like those ads telling you about those "sexy" mmos. It is unimaginably frustrating to be fighting somebody when I'm just starting a game and it stops everything mid sword swing and interrupt my literal first impression of the game to tutorialize things in the worst possible way.
Nintendo, their mob extortion mentality for youtubers seems to be part of a strategy to gradually implement worse and worse things slowly so nobody really makes a stink about it.