I'd have to agree with Lena. It has its problems, and is not the best Fallout game ever but it's overall still enjoyable. Despite all of its problems I was able to immerse myself in the wasteland like any other Fallout game and have fun.
Have you read any of the other posts in this thread? Some of these guys are going on like Fallout 4 bombed hardcore, and is so buggy its unplayable.
I've seen many posts like that, too. Be it from people peddling half truths, lies, or simply being misinformed. They're always trying to startup a circlejerk of hating on the game.
You know, that is not a very honest thing whatsoever. At this point, Fallout 3 fans are hating too. This just happens to be a forum where there are quite a number of people who are not happy with Bethesda's Fallout. But I will say a lot of them are constructive, and it's not fair to point out a few posts here and there to judge the forum by. It's a forum, people have opinions. What is so wrong with that?
Theres nothing wrong with it at all, and I'd bet you'll have people now that love Fallout 4 that will hate Fallout 5. It seems clear that people love their first fallout and hate anything after it, like the guys who loved Fallout 1/2 but hated 3, and as you say there are guys who loved 3 but hate 4. Opinions are fine, the problem is just the half truths and outright lies like Fallout 4 bombed, which isnt true.
As for the bugs, while its true i've had no problems, and neither have my friends, we are on AMD machines, made to be more powerful versions of the PS4/XBone hardware. I have to wonder if the people having problems are on nVidia/Intel machines, as that would be the most logical, since all the consoles are AMD machines, i suspected most AAA outlets wouldnt be arsed to properly tune these games for nVidia/Intel machines.