Source? I know Cullen says Meredith was pretty much lost, but never heard him say before she had the Red Lyrium sword.
Play the game, I have zero idea what to actually look for to go to that source. It comes up in personal discussions with him and he says it was all Meredith's fault and she bothered the mages for no real reason. Made them tranquil for sending letters. Maddox is product of Meredith, as you well know.
Doesn't matter if he is paranoid. Faults add to the character, remember? That's what you said about Solas being the best. Loghain is better in the sense he is more consistent, has a believable and even sympathetic reason for thinking how he does, has what he thinks are the best intentions for those he is sworn to protect, etc. All this makes for a fascinating villain/anti-hero, and are things Solas lacks. Thus Loghain is better.
As I said you are being naive. Loghain does anything for Ferelden, so does Solas. Solas is a lot more grand and involved with the world, which makes him the better character.
And if Solas never started his whole plan to destroy modern Thedas, none of the events in DAI would have happened. He wasn't being helpful, he was cleaning up a mess that he made that was now interfering with his plans. He saw the Inquisitor and Inquisition as merely tools to do so. There is nothing sympathetic in that.
And no, he is not the last hope for the elves of Thedas since he plans on them dying along with every other race. The only elves he is helping are the ancient ones, the ones who don't see the elves that need help as even people. Plus I'd say Andraste was a pretty big help towards the elves.
No he doesn't. He massacred hundreds of innocent people with his bomb and sacrifices an entire Circle of mages, the people he says he is trying to help, just to send a message. All he wanted was war.
What? There are lots of villains who were/are underdogs.
What character development? The character that Solas set up was all a fabrication to conceal his true self, and he is going against what he stood for while as the Dread Wolf. He has gone crazy and lustful for power to achieve his ends, just like the people you are saying are bad villains/anti-heroes.
No, he wasn't. DAO was planned to be a standalone game since Bioware didn't think it would get sequels. That's why they had to retcon all the Epilogue slides.
What evidence?
My using lunatic was a case of wordplay. The word originates from people who go crazy at the full moon, he is the Dread Wolf and wolves howl and act slightly different during full moons, so it fits. Though he does fit the definition for it in the sense he is insane.
Rest of your Answer is here:
Loghain was well written, but his character isn't really intertwined in the mythology of the Dragon Age series. The same story of Loghain (basically a crafty politician who betrays a king) could be applied to just about any setting.
On the other hand, Solas represents a conflict intertwined in the settings of DA. Solas represents (in mentality and origin) a higher-order being different from the ordinary people of Thedas, and the conflict between these two "peoples." Solas' is more rich in this sense, and more interesting from a Lore perspective.
Overall, I think Solas is the more interesting anti-hero than Loghain.
As for the DA2 characters....that game wasn't any good in the first place, and all the characters suffered from the game's weak writing.
As for DAO. I doubt Bioware writers wrote a story without and end. The story was written, whether it was going to turn into a game or no was not decided, true.
With just a simple search:
Motive: An antihero is often driven by impure, but sympathetic, motives. Vengeance is a big one. Who among us hasn’t wanted revenge? We might not agree with it, but we sympathize. A villain is driven by impure, but unsympathetic, motives—power for the sake of power, for example.
Means: An antihero is often the underdog. Even when we don’t agree with the antihero, we find ourselves cheering for underdogs. It’s hard to cheer for a villain who has wealth and power and all he needs to defeat the hero/antihero.
Anders was never a villain. Learn your tropes.