Uh-huh. What's the problem with the NV's plot? Apart from the fact it doesn't have one.
Its mostly a lot of small stuff that adds up
-I didn't like the fact that Vegas basically achieved nothing in 200 years, not even a basic civilized town, despite the fact it had what amounted to a post war paradise in terms of fresh water and available farming land. This idea House just made it all in less then a year is kinda silly. As much justified flack Fallout 3 gets for it, New Vegas just took it to an absurd level. Even the Capital Wasteland achieved Megaton, and trade routes to other settlements, 100 years ago.
-I didn't particularly care for going after Benny(something I think Sawyer even commented on once). Which made the whole intro kind of a slog
-I didn't like the invisible walls(something Sawyer also commented on), and obvious monster barriers, as it made the world feel artificial.
-When I reached Vegas, and all the factions jumped by asking for help, I didn't feel like I had done anything worthy of being asked to help them
-When it came to the factions themselves, I felt Obsidian took things a little to far.
---I get that the NCR is supposed to be corrupt and inefficient, but their total failure to accomplish basically anything in the game itself by themselves made sympathizing with them difficult.
---On the other hand, The Legion were rapists, and slavers, and only the guy who showed any sort of remorse or sympathy about it was the guy who watched the dogs in the Fort, and even then, it was just like one line and hes quickly back to being just another RAPE EM ALL! Legion solider. I also didn't like how the Legion was behind so much in the region. I mean, them doing some of the stuff is obvious stuff they would do, but the level at which they were secretly behind everything made them feel like cartoon Machiavellian villains.
---House was just kind of a dick, and the fact all his plans had fallen apart, and everyone hated him, made believing what he said difficult to take seriously.
On the other hand, in Fallout 4.
-The Commonwealth has far more actual history, with places like Diamond City being 100+ years old, and has had trade routes and stuff just as long. And while there is no organized government, they did at least try, and theres an explination as to why it fialed, and why none other has risen since then.
-As shoehorned as the whole "muh son" plot was, I at least understood my character's motivation for going after Shaun.
-The game world felt more natural. While there are areas with higher level monsters then your level in places. It wasn't so obviously designed to funnel you into a path.
-The factions wanting you help made more sense, as you actually have to go and seek them out yourselves, and in all of them you do some test to prove you have skills. Even if the test was rather simple.
-When it comes to the factions themselves, while Fallout 4 didn't provide as much information about them, I felt they were better handled.
---The BoS are massive racists, but at the same time we actually see them going around the map, their PA soldiers easy cleaning the wasteland of terrors such as ferals, and super mutants.
---The Institute are said to do all this evil stuff, but when you get to The Institute itself, you find out most of it is made up paranoia of the suerfacers. Many people in The Institute express clear remorse over the lives the people on the surface have to live, even if they aren't willing to help them due to past attempts failing.
---The Railroad were effectively terrorists, and were largely responsible for much of the synth paranoia in the region due to them placing mind wiped synths into the general populace, but they otherwise had a noble goal of trying to free "people" who apparently had actual sentience from a group of basically slavers.