When it's done over and over due to the person not knowing what they're doing, I think it is. I'm not even saying it's spam because of salt, I even won the first match where he kept on doing the same shit. I learned how to counter him fairly quick, but when you do moves over and over because you literally do not know what the hell you're doing, you spam. That's how I look at it, anyway.
I will do it over and over again, to keep you from pressing buttons and frustrate you. Which is what 6K2K is supposed to do. Frustrate you and condition you to do what you don't want to do.
The mid set ups an offense while the low is the mix up. Will I do it, or no? You have to guess at it. If I see you trying to hold the low then my offense has widened. This is not spam, this is conditioning.
To people who do actually know what they are doing as Ayane, of course. I respect game plans and knowing your moves, but that's not what this person did. He mashed out of his negatives and did the same three or four moves during both fights, and he performed one juggle (6PP > PPPK). If he was a good or just at least a decent Ayane, I would not bitch about it.
For someone new, that's still not considered "spam". If it's their strategy, then it's their strategy, they are learning and doing what works for them for the time being. People gradually learn more as they keep playing.