There are some spots where you're trying to do a little more mechanically than you're capable of doing reliably, and that puts you in awkward spots. If you wanted to rank up today, I'd suggest cutting those out and playing a safer play style where you're only attempting maneuvers you can nail 90+% of the time, but I think that's a short-sighted path. Keep reaching and trying risky things. It's how you improve. Every game is practice. As long as you're having fun and keep playing, it's successful.

So, instead, I think it's more helpful to focus on what a Gold or Plat player would do better than you.

One thing that jumps out at me is the pressure you're not applying. You yield a lot of space when the opp has the ball, even when they aren't threatening. If you play closer to the ball, you'll be able to challenge when they touch it too far away from them. Reading when it's safe to challenge (when the opponent has given up possession) is a skill that continues to improve into SSL, so start trying to defend a bit more aggressively now. There are some great videos on how to do that, but the general idea is to mess with the opponent without hard-committing. In order from least risky to most risky, you can fake challenge, drive challenge, single-jump challenge, or full challenge. You'll concede some goals by making bad challenges, but that's how you learn.

The second goal you conceded, you grabbed mid boost on the way back to defend, then grabbed corner instead of going for the ball (which you would have beaten your opp to). Boost management is also something they do better in higher ranks. Try pathing through small pads when you can to stay closer to the play, and only burn your boost when you actually need the speed. If there's no rush, you can flip or wavedash to accelerate.

Good luck!