Imagine every film you watched was the same length as the entire Lord of the Rings trilogy (extended of course). Now imagine that the second half of that marathon suddenly dumped 5 subplots on you, switched genre with no warning, or just made you watch the first half again with a new filter. That is what it's like to play these games.
In attempting to stay relevant beyond the first few weeks of release and also compete with other triple A behemoths like Skyrim, or The Witcher 3, most games in the past decade have artificially extended themselves beyond the point of fun. Because obviously this is what everyone wants, not coherent plots or well flowing pacing. No, we want a huge open world with 5 activities max outside of the main missions.
If only developers accepted that games are allowed to be less than 20 hours long as long as they're coherent, good, and fun, like The Last of Us or the recently released Devil May Cry V. Then maybe playing some of these games wouldn't be such a damn chore.
10. Dragon Age Inquisiton
Dragon Age is a franchise that just can't seem to nail down a fan base. If you love Origins, you'll hate II, and tolerate Inquisition. If you like II, you'll think Origins is too archaic and be put off by Inquisition's world. If you fancy Inquisition then you love MMOs and you're a big fan of never truly understanding what anybody is talking about.
The problem with the latest Dragon Age title is that it tries to please fans of both games and succeeds at just further alienating them both. Instead of playing Inquisition, most newcomers to the series will be stuck in the codex section of the game for hours on end trying to remember names of ancient elven gods, looking up exactly which Orelsian noble is which, or even trying to piece together what the events of previous entries were.
This coupled with the fact that every quest that isn't story or companion related is relegated to "fetch 10 bear arses for this random Fereldan peasant", and the game feels more like an MMO than a single player story RPG. So by the end of the game players will have spent countless hours feeling less like the badass head of a world saving organisation and more like an errand boy with a fancy title.