Did you read all my post? The bag of voters who have been manipulating begun doing so at Aquamarine 7, against Kurumi. Why? Because they wanted to? Who knows. Why did they chose Kotori first, and allowed Asuna to be humilliated by Yoshino? Why did they switch sides at the end of Emerald, which made Kotori almost lose against Rikka? Why did Kotori lose against Tsukiko? It's commonly accepted that those voters act from China. Look at the color of China in Aqua 7 and then in this round. Their support for Kotori simply vanished. No extra help from those voters, and results change damatically.
Those voters aren't fans from anyone in particular. They simply coordinately support whoever they want for their own reasons. Maybe it's a hype caused by a transitory peak of popularity of a character, maybe it's for fun, maybe it's to demonstrate their power. This is no Mikoto, Kanade, Kotori or Asuna fandom. No. It's a bag of voters that decide to manipulate the results. Why against Kurumi? Because she was the strongest contestant at Nova, and everyone agreed on that at the beginning of the season. What happened in that match? Everyone, or almost everyone, thought Kurumi would win. There was a pro-Kotori campaign that Kurumi fans mistakenly didn't answer. Maybe Kotori would have surprised Kurumi equally without those voter's help due to the overconfidence of Kurumi fandom. But the truth is that Kotori received that important help. And continued doing so until those voters suddenly abandoned her for Asuna. Because they never were her fans. Same for Asuna. Does her role at SAO II explain her rise of strength? Definitely, her role alone can't. She does near to nothing. But hey, SAO II airing, bored of Kotori... Why not switch to Asuna, who is struggling in the middle of T1?
It's true that Kurumi fans mobilized along the season, but it wasn't due to DaL II. What isn't true is that the loss of strength of Kotori can be explained by her lack of screen in DaL II. If Kotori was so strong at the beginning, why has she lost that much strength and so, so suddenly? You say she didn't have any screen time. She was strong before DaL II emision... then, that screen time, even if short, makes her weaker? It doesn't make sense no matter how you look at it. The difference is, Kurumi had a fanbase there for her, and Kotori didn't. Once Kotori lost that extra help, Kurumi won. Kurumi has endured more attacks from that bag of voters than anyone. As I've said, I think we can agree that is commonly accepted that the bag of voters act form China. Look at China in the world map in all of Kurumi's T1 matches. Look at China in the world map of all of Kurumi's NM. Look at China in the world map in the decisive PS matches, that is, Rikka and Nanami. And finally, look at China in the world map in this match against Kotori, and compare the color of China in that unimportant match and when Kotori has lost their support against Aquamarine 7. They interfere in the decisive matches, and always against Kurumi. Why? Only they know, but my guess it's because it's not fun to support someone with the fanbase she has. Too easy. They rather go along with hypes (they want upsets, and hypes make them easier), switch for fun, for the self-satisfaction of being able to bend ISML to their will, or for whatever any other reason they might have. But if after all what has happened, you refuse to see the truth, I won't try to convince you. But if you wish to begin understanding what is happening at ISML, you should accept there is a bag of voters bending results to their whims. They aren't fans of anyone, or else they would have never left Kotori, or they would have been with Asuna from the beginning. They just have fun that way.
Do you, in the contrary, choose to believe all are "miracles" suddenly happening and crumbling as quickly as they were built? Be my guest.