I'm seeing a lot of negativity toward this; is it justified?
I don't think so, but it depends on your outlook really.
Many of the negative articles I've read tend to get many things outright wrong. Not just 'difference of opinion' wrong, but 'might as well be completely lying' wrong. At the same time, there's no denying there have been problems.
There was a bank bug, which meant that a small number of people lots any bank upgrades they had purchased. It took them a while to fix it (by a while I mean 2 weeks - 2 weeks at the launch of an MMO is, I'm learning, the equivalent to infinityx12 to many people). There are many, many gold farming bots who will ruin your day when you're trying to get credit for killing a dungeon boss - could that not be spun as the sign of a successful MMO launch though? We could spin it many ways. There have been 2 duping exploits so far, both have been fixed. According to some, they have broken the game beyond recognition and it will never come back from it and the sky fell and killed everyone along the way. Neither dupe has altered the game in any way whatsoever for me. There are some quests that seem to break rather easily, with NPCs not spawning correctly or failing to let you interact with them when you need to. This is the biggest problem, imo. Some can be fixed by simply relogging, because you'll likely be put in a different 'phase' when you return, where the quest won't be bugged. But some don't seem to be fixed that easily, and require intervention from the devs. Again, 2 weeks is literally the longest time ever, and so not all of them have been fixed yet (although many have) and there are still some people who are having problems progressing from one area to another. Load times can be long when entering Cyrodiil, although I hear that lowering your graphics before entering can help that. I've only had problems getting into Cyrodiil when I was already in a large group. Alt+F4 and a relog solved it.
The people who are getting on with playing the game pretty much all love the game. There are some annoyances, but it's the minority who are encountering them. It's a strange old thing though. It seems to have spawned the kind of community buzz around it whereby everything is blown out of all proportion (fancy that), but what is happening is that because of the sheer scale of the game (and it is huge), reviewers aren't able to experience it all before they write their review and they're falling back on what they've read on forums and the various controversies on them in order to inform their opinion in their reviews. Personally,I think that's really fucked up - but it's easy to spot that it's happening. I spend a lot of time browsing the eso subreddit, which due to its nature references a lot of what happens on other forums and websites as well. What so many people get up in arms about is stuff I've almost never experienced myself - and neither have the majority of people I speak to in game either, and certainly not in the massive game breaking doom the end of the world is nigh this game will fail in a month kind of way. But those things end up informing large parts of some of these negative reviews. It's very peculiar.
I'd expect if you've been reading about the game, it's difficult to go in without any preformed ideas and expectations. But I'd suggest doing just that, if you were to buy the game. I love it. Questing is about as good as I can imagine it being in an MMO without them spending 10 times as more than they did. They've put a lot of effort into the stories - and I'd go as far as to say they are richer and have more depth than your average TES story quest. You never do anything for no reason. And when you are on quests, there will be notes, books, NPCs to talk to, all giving you as much backstory and lore as you could ever desire. All of that is optional of course, if you don't give a shit about that sort of thing. You can race to 50 (which, actually, is only the first 1/3 of the PvE side of the game) and do little exploration and have a great time. Or you can slow the fuck down, explore every inch of coast and forest and lava field and rocky outcrop, read every book, hunt every skyshard and lorebook, kill every enemy, delve every dungeon, gather each achievement, gather materials for crafting... and just enjoy the journey. You can go into Cyrodiil (PvP) and join a large group and go and help bring down an enemy army and take their keeps, or defend your own. Or you can sneak off alone, deep into enemy territory, and scout out their resources, find random dungeons where you have to kill the NPCs while being mindful of enemy players you might encounter doing the same, you can camp out in quest hub villages and snipe enemy players as they unwittingly stumble along, you can join up with a smaller group and go skyshard hunting or sneakily stalk the enemy as they resupply fresh troops to a nearby siege, ganking them and hampering their war effort. You can do it all in the same night if you want.
I'm smitten by the game. There are problems, but aren't there always? I'd recommend if you get the game that you spend more time playing it than you do worrying about how other people play it.