"Worst" is a harsh word because it makes it sound like it is just "bad". I liked all of the games, and whilst DA2 was probably my least favourite game in the franchise, I never found it to be a "bad" game.
Origins was great, but there were definitely a large number of problems. For a game that came out in 2009, it was certainly an ugly one. Texture quality was poor, character models looked ancient, and combat animations looked lackluster, and not even the art style could really save it because it was so generic looking. Then there were the deeproads that dragged on for hours without really looking anything different aside from the occasional setpiece such as the bridge, and the fade area was just confusing and plain awful too (yay mods!), and these areas just made the game drag on. What really saved Dragon Age: Origins though, was the story (which did the whole army building thing better in one game than Mass Effect could do in 3), and the companion interactions with great characters such as Alistair, and Morrigan. I really did enjoy Origins though, and the combat is still fun enough to make it enjoyable to play.
Dragon Age 2 was quite a step down in some areas like scope and scale, but I still found enjoyment in it. The game did look better than Origins (texture quality was still butts), yet the aesthetic of the game was still very lackluster, a shame since you very rarely ever venture outside of a small handful of areas. I felt the combat was improved in this sequel, but the enemy spawning system made it practically impossible to position your companions correctly as enemies had a habit of spawning behind them, often resulting in your more squishy characters dying because the tank was dealing with the initial wave of mobs. Whilst the game never had any annoying or dragged out zones like Origins, the issue came with the constant reuse of the same cave, ruin. dwarven tunnel or alley, and this eventually became tedious because you were never really seeing anything new. In terms of the story though, I liked some of the companions such as Isabela and Varric, and whilst the story certainly felt more unique than that in Origins, the lack of having this one central goal/antagonist made the game feel quite disjointed, and they never really did anything with the city (Oh look, its on fire again. I wonder if this is going to have any visual impact. Oh, I guess not.).
Inquisition was certainly another step up from 2, but it still had problems. First off, the combat felt like that in 2, which was nice, and it seems like they stopped with that whole constant spawning of enemies thing, which was also nice, and the game looked absolutely gorgeous in some areas too. Double marks. In terms of zones though, it never really felt like there was ever a real reason to visit some zones other than to level up your character, which is a bit of a shame. Zones like The Emerald Graves, Exalted Plains, Fallow Mire, Hissing Wastes and Emprise Du Lion never had anything story related in them, and this was a shame considering that the Emerald Graves and Emprise Du Lion were some of the most unique zones in the game. The story was also back to the size and scope of Origins, and the use of another central threat/goal helped to advance the story, even if the reasoning for going to some zones ended up being somewhat questionable. I also feel like Inquisition had the best selection of companions too, with Varric, Iron Bull, Cassandra, Dorian, Sera and with appearances from Alistair, Morrigan, Hawke and Leliana from previous games.
Overall, I think I might actually prefer Inquisition over the other two games, all things considered, but that isn't to say that either game is bad.
Origins was great, but there were definitely a large number of problems. For a game that came out in 2009, it was certainly an ugly one. Texture quality was poor, character models looked ancient, and combat animations looked lackluster, and not even the art style could really save it because it was so generic looking. Then there were the deeproads that dragged on for hours without really looking anything different aside from the occasional setpiece such as the bridge, and the fade area was just confusing and plain awful too (yay mods!), and these areas just made the game drag on. What really saved Dragon Age: Origins though, was the story (which did the whole army building thing better in one game than Mass Effect could do in 3), and the companion interactions with great characters such as Alistair, and Morrigan. I really did enjoy Origins though, and the combat is still fun enough to make it enjoyable to play.
Dragon Age 2 was quite a step down in some areas like scope and scale, but I still found enjoyment in it. The game did look better than Origins (texture quality was still butts), yet the aesthetic of the game was still very lackluster, a shame since you very rarely ever venture outside of a small handful of areas. I felt the combat was improved in this sequel, but the enemy spawning system made it practically impossible to position your companions correctly as enemies had a habit of spawning behind them, often resulting in your more squishy characters dying because the tank was dealing with the initial wave of mobs. Whilst the game never had any annoying or dragged out zones like Origins, the issue came with the constant reuse of the same cave, ruin. dwarven tunnel or alley, and this eventually became tedious because you were never really seeing anything new. In terms of the story though, I liked some of the companions such as Isabela and Varric, and whilst the story certainly felt more unique than that in Origins, the lack of having this one central goal/antagonist made the game feel quite disjointed, and they never really did anything with the city (Oh look, its on fire again. I wonder if this is going to have any visual impact. Oh, I guess not.).
Inquisition was certainly another step up from 2, but it still had problems. First off, the combat felt like that in 2, which was nice, and it seems like they stopped with that whole constant spawning of enemies thing, which was also nice, and the game looked absolutely gorgeous in some areas too. Double marks. In terms of zones though, it never really felt like there was ever a real reason to visit some zones other than to level up your character, which is a bit of a shame. Zones like The Emerald Graves, Exalted Plains, Fallow Mire, Hissing Wastes and Emprise Du Lion never had anything story related in them, and this was a shame considering that the Emerald Graves and Emprise Du Lion were some of the most unique zones in the game. The story was also back to the size and scope of Origins, and the use of another central threat/goal helped to advance the story, even if the reasoning for going to some zones ended up being somewhat questionable. I also feel like Inquisition had the best selection of companions too, with Varric, Iron Bull, Cassandra, Dorian, Sera and with appearances from Alistair, Morrigan, Hawke and Leliana from previous games.
Overall, I think I might actually prefer Inquisition over the other two games, all things considered, but that isn't to say that either game is bad.