So yeah, stopped playing this around two weeks ago. I think I got far enough in the game to summarize my general feelings on the game.
It feels like pretty much every single mechanic of the game has been designed specifically to actively discourage you from role playing at all. The main character has a clear and defined backstory, a love interest, and a personal motivation to continue doing what they’re doing, all of which are completely out of the player’s hands, the complete removal of the skill system by rolling it into the perk system (which I’ll get to in a minute), etc. The way that quests are unrefusable, and how many of the quests seem to be written with a good character in mind, also makes it incredibly difficult to play an evil character farther than either being a petty dick in conversations and/or just bucking the system completely and shooting everyone on site. When you do suddenly wander in to a quest for a group of morally dubious people (as I literally just wandered in to one), then suddenly your lawful good character is a greedy hood who’s only option to refuse to partake in a heist is telling his two associates that he can just kill them and do it himself.
So the role-playing’s gone, that leaves the quests, and the quests are pretty much all the same. You talk to somebody, maybe tag a few charisma checks that’re utterly inconsequential to the actual resolution of the quest, then you go somewhere, or in a bunch of different places, kill everything that moves, and go back. This might be fine if the writing was good, but at best the writing in this game is mediocre, and this game is not at its best a majority of the time.
So if killing’s all you can do, that leaves gameplay. Fallout 4’s gameplay is, to put it nicely, a poor man’s imitation of Far Cry 3 with bland and ugly guns. It feels smooth, it feels kinda polished, and it might even give you a hard time in the first few hours, but the game honestly goes out of its way to cater to the player and try to make things as easy as it possibly can. They try and fool you in to thinking things are harder by jacking up prices at vendors and jacking down resale value for items, but surviving solely via subsistence looting is easier here than in any prior Bethesda game. Your weapons and armor don’t degrade, enemies drop plenty of ammo when killed, and plenty more can be found in respawning caches at various ruins and hideouts, every second bandit will drop a stimpak when killed, every monster will drop meat that can be used to cook ludicrously effective healing items, by the end of the game you’ll probably have enough fusion cores to permanently walk around in your capitalist rape tank armor, and so on.
The perk system is pretty blatantly uneven, too. Strength is only worth investing in if you want to make a melee character, intelligence is virtually worthless unless you’re an autist who wants to unlock everything in the game, perception is mostly situational save for a few of the early tree perks, Agility has a lot of early-tier perks that will make you an utter god of death stealth character, and almost all of the Luck perks will make you stupidly broken stupidly quickly. You'll not that I didn't mention Endurance, and that's because Endurance is so worthless it isn't even worth mentioning.
EDIT: Oh, and Charisma. Charisma exists solely for you to get the perks necessary to fully upgrade your settlements. If you're in the game for the settlement building, then you're basically crippled unless you take the level six charisma ability to link your settlements together via trade routes. If you're not bothered by this, it's safely ignorable. If you are, then pretty much the entire tree is still pretty safely ignorable.
The gameplay and quests seem to be designed intentionally to create some kind of addictive feedback loop, too. You’ll be given a quest to go to x-location in order to kill y amount of enemies, then return for a reward. That’s fine for the first few hours, but after a while you start to realize how utterly pointless everything is. After a while, you’ll realize that all you’re doing is killing bandits for XP points to make your character even more broken than they already are, weapons and armor that’re slightly more brokenly overpowered than the ones you already have, materials to further deck out your settlements that will in no way affect the game world or the story, for a reward you don’t need because caps in this game are basically worthless, and the soulless gratification of nameless helpless person #2313515. There’s no point to anything.
Guess I might as well put in a few words about the companions too. They’re all pretty boring cardboard cutouts with little depth or complexity to their character. Bethesda also seems to have taken to heart the criticisms from Fallout 3 and New Vegas that companions utterly trivialized fights, and instead made companions in Fallout 4 completely and utterly useless as anything other than a pack mule. They’ll often distractingly wander away from you, refuse to acknowledge that they’re in a fight until a feral ghoul is right on top of them and trying to face-fuck them, and are taken down in short order. Basically just keep them around to abuse their affection system, sit through Besthesda’s laughable attempts at character writing, get their perk, and dump them in some far off settlement in the middle of nowhere, never to be seen again. Rinse, repeat.
There’re so many other issues with the game that I won’t bother getting in to, but I’d say Fallout 4’s biggest crime is that it’s just boring. It’s competently enough made that it’s playable, but it’s not as much of a titanic-tier wreck that Fallout 3 was, and as many people will tell you; when it comes to entertainment, there’s absolutely nothing worse than average.