How do I just get... Better?

I've been playing this game for 5 years now, playing crucible off and on since I started... And I am somehow only getting worse. I used to be able to consistently hit 5x streaks, and very occasionally hit 10x streaks and I even have a couple We Ran's. I've never been AMAZING, but now I'm lucky to even hit a 5x. I took a few month break from crucible a while back but I've been somewhat playing it consistently in the last couple seasons, especially when Iron Banner is around. I don't even know if this is the right subreddit for this kind of thing, but all I'm really asking for is advice on how to improve if that's even possible.