Did this turn into "share your experiences with getting better at Touhou"? Kay!
I've been playing for almost a year now and I'm still terrible. Haven't managed to 1cc anything on normal, and I've done everything on easy at least once but there are a couple I can't get consistently.
Oh well. I don't want to ever stop improving, and seeing myself get distinctly better feels good when it happens, but I'm not a competitive person at heart and I've accepted that I have to move at my own pace, which is slow. I can't stand doing the same stage over and over again, indeed I can't really commit to playing every day even though I enjoy the games. And oversaturation definitely happens; there's a point when I know I've been playing too long because I start flying directly into everything, which is annoying if I still actually want to play. I'm not one to rage either. The games are what I came for and I have a lot of fun with them, but these days they're not my only draw by a longshot. I'd just like to be able to do Extra stages someday, even if it takes ten more years...
Oddly, although I've yet to 1cc a normal mode, the one I've come closest with is SA. Why? Because it's the most likely candidate for my favorite Touhou game overall even though it kicks my ass, and I've played the literal hell out of it on easy. Surely, if I best SA normal, nothing should be able to scare me anymore! But I've barely played anything other than UFO lately.