That's a good standard of play! Out of interest, how good are you at driving games?
I don't consider myself that great, but I do put an effort into time trials and finessing the job such as with braking, throttle control, and seeing the best line I can exit at faster speeds with.
On the note about transferrable skills, the skills required in driving games (assuming we're using a simulator or anything remotely close to one) and Rocket League are so vastly different.
Driving a car requires you to understand all the nuances in physics that happen, such as weight transfer, throttle control, counter steering, threshold braking. You're also only looking one direction and going one direction. Steering would jsut be a change of that direction.... but you're always moving forward.
In Rocket League, to me, it's a constant assessment of where you are in space relative to the ball, especially when you start dealing with aerial play. I've always attributed to aerial control (and air dribbles) to playing Asteroid (1979), but with gravity, and a 3rd dimension to account for. You need to account for your position in space, your speed and direction of travel, as well as the ball's speed and trajectory. In my mind, there's a line I'm always drawing in my mind where the ball is going to travel, and I have picture the line I need to take to meet it in time... sort like flying a space ship to collide into a moving asteroid. There's a lot of calculation you have to do that you just don't do with a steering wheel and rubber tires.
I've been actively playing Rocket League for 7.5 years now, but not focused on any training routines. I've only been learning to get more comfortable landing flip reset setups off the wall, but it's not at a level I can depend on in a match.
Have you found it harder to get the same rank in the last few months? I'm low to mid Champ 1 in 3v3 (solo queue) at the moment, which isn't much different to a year ago, but in 2v2 it seems way harder, I've been close to Champ 3 in the past but now barely scrape into Champ 1.
Based on last season's rank distributions, mid C1 3v3 is probably around top 3%, whereas I can generally set top 1% times in Forza rivals, I feel like it's easier to get to a given % standard in Forza rivals than Rocket League.
Barely more difficult, but they tweaked some values on the backend that would queue with a wider skill-range of players, but I'm still more or less where I need to be.
I also think that most people with a lick of driving competence will land in Forza's top 1% because of how many user accounts are playing this game. I've never not landed anything less than, and I'm not even trying to brag.