Learning through loss
One of the things I think I notice when I look back at when I slumped was that it was a period where I was heavily trying to learn new things. I know I messed up a lot of games with my 3gate timings or my 1GFE. Or even when the build didn't lose me the game, just the act of doing something off my normal autopilot caused me to mess up other things. I'd like to hope that I came out ahead of where I was even though I had to lose a lot of ranking in the process. At the time I know I felt like really buckling down and trying to actively learn to play better would be more immediately noticeable. But I guess that was naive.