Setsuna? That's interesting, I never thought of him as a know it all, just as someone with strong opinions as a result of trauma after being a child soldier. And I always thought the "I am Gundam" thing was funny, lol.
In season 2 the fights just felt a lot less creative, for one. Still cool, because giant robots, but yeah. Also, I didn't like the direction they went on with the Innovators, the whole thing with Anew, and Lockon II. I get he had his issues, but he was just needlessly cruel at times. Also, the one thing I will never ask for is more romance and they gave me precisely that. Oh, and Louise and Saji getting more screentime.
But now I want to rewatch Yu Gi Oh, lol.