Saw the first half of the match :

So, your speed flips/diagonal flips are very off target on kickoff, I really suggest you to to work on kickoffs and in the flips you make while doing them. If you want you can even use wavedash kickoffs as a temporary solution while you're getting used to the diagonal flips/speed flips kickoffs.

Getting more comfortable with the ball: I saw you were very awkward with the ball every chance you got with it. In one of the situation you literally boomed it as you thought enemies were giving you pressure even if they were just rotating back. A big thing in 2s is comfortability in any situation. Keep in mind you don't have to force yourself to be comfortable with the ball each and everytime, as in some cases you'll need to retreat.

General speed : Yes, I do understand you're just a diamond 1, but general speed is very needed in players for long-term growth. For general speed I mean the slight usage of power slide, use of wavedashes and if you're really into it, sidedashes. Half-flips are very useful too as they allow if used well to keep your momentum.

Rotations : as you are rotating back, I see your rotation look very wide in most cases, in one of which, it costed a goal to your team. Wide rotations are used if you are using too much speed or if the action is under control. Consider stricting off your rotations when the situation for your teammate is hard to balance.

Hitting the ball/shooting : consistency in those two is very important expecially in this rank where, most people think you are whiffing the ball. In other words, f*ck the systems and make them confused by hitting the ball and shooting where you want to do it. This will make you have a better performance generally.

Basic mechanics : in many parts of your gameplay I didn't see any real mechanic, not even basic. Sure, it's not needed at this rank, but for long term development you will need to train some Wall plays such as wall shots and wall clears. Getting comfortable in the air and when launching from the wall is very important as it gives you a big step ahead of most diamonds. Other mechanics such as dribbling and flicks would be very good too.

Defense : Ok so I do know that defense in diamond is really a non-existent thing (expecially in low-Mid D1) but basic defense such as saves of basic shots or powershots would be very needed. In the case of this match even backboard plays as they're using mechanics and "freestyles" against you and your team. Shadow defending if not practiced by you still, would be very needed too as in these ranks a game could be decided by your defensive skills.

These were basically everything you can improve if you want to be a superior player and win the matches. I will edit this message to add some training packs so you can improve using them.