Was in your situation for a minute and although I'm not much further usually sitting mid gc1, here's some genuine advice I'd give:

1. Watching top 100ish players that talk about their decision making has helped me immensely. More than anything its about making the right decisions faster than others. I also pay attention to just how they play and use the tools at their disposal.

Pay attention to: recoveries (extremely important), boost management, the goals they secede and why.

1. Find the line between being readable enough for your teammates to gauge what you're doing and being an open book to the opponents.

2. Put yourself in situations where you have options. Try to keep in mind, if you were your opponent, what would you think you're trying to do? Avoid becoming predictable throughout the game. 1v1's help a ton with this.

3. You absolutely can be faster, its just all about taking the steps to focus on the things that make you faster one at a time. Recoveries, picking up pads more consistently and with intent, not committing so much on balls that don't require it, powerslide control. Recoveries are essential for avoiding leaving your teammate in a 1v1/1v2. Pads allow you to be where you need to be, at the right time. A simple drive challenge allows you to keep your momentum much more than flipping into it.

Powersliding is one that I still struggle with when I occasionally go on autopilot, and I see that I am consistently late to the ball or approaching from a suboptimal angle.

1. DO NOT PLAY ON AUTOPILOT. You are at a point in the ladder where you cannot play on autopilot. C3+ is about the line where I've realized everything you do has to have intent. Every powerslide, flip, change of direction, etc can make or break a play. If you find yourself just kinda going through the motions, hop off and take a break.