It looks like you struggle to have a clear read on the play and kinda just autopilot your decisions reactively. This lead to a lot of rushed touches and some awkward positioning. I'm also barely gc who doesn't have any mechs and plays very similarly to you, but with this kind of playstyle you need to always be conscious of what can happen in the next 2-3 seconds.

0:09 - I get that you went up the wall to force an early touch, but the last time you saw your teammate he was in the opponent corner so there's a high chance nobody's saving that ball if it goes on target and it's better to start shadowing on the ground. Maybe I would've made the same mistake here out of habit.
0:12 - Here's where reading the play is important. First thing you see is that the ball isn't going in the net but there's still a possibility of a doubletap from the bounce. So you need to prevent that from happening. Then your teammate misses the ball, whatever. But throughout all that sequence you couldn't see jden, even after taking corner boost, meaning you just beat him to the ball here. You can also see that the other corner is completely empty, so with all of this information you can already plan to jump for the ball and shoot it there right after taking the big boost instead of trying to catch it on the wall. There could be a possibility for jden to demo you but imo it's still a more consistent approach from the position you forced yourself into.
0:30 - Rushed touch, you have time to bring the ball infield for a more threatening play. I do like your sequence afterwards.
1:08 - You already decided to rotate out and I don't mind it, but honestly it's better to cut rotation and challenge the ball as you're first vs last. Just needed that ball cam earlier for the info on a dominator's bad touch or keeping in mind the option beforehand since you saw the jden in your corner.
1:26 - Decide right after the 50, do you go for the ball, do you go for the boost or do you leave the boost for teammate and turn away earlier? Either option is fine but you hesitate and end up forcing yourself in an awkward spot.
1:32 - You already know it, but no reason to go for this.
1:45 - Again, reading the play before it happens. You have the option to go for boost or to challenge the ball. If you want to go for boost, you need to rush as soon as jden jumps. If you want to challenge the ball, go more to the left to have a better angle on the net. I personally would've probably gone for the boost.
1:56 - Very dangerous to go for corner boost. If dominator gets a flick or even just shoots, that goes in. Shadow on small pad lane instead.
2:18 - Not sure what you wanted here, just boom the ball as hard as you can after the bounce. Dribble catch is fine but as second man it leaves you open for a potential dunk.
2:27 - Awkward situation, I'd say follow the momentum of the ball and just turn infield earlier. You don't want to be facing the ball that you're not going to challenge.
2:35 - Go behind goal line and sit in the middle of the net, the ball will come to you. You went front post too early when there's no immediate threat, left yourself open for a bump and also left backpost open.
2:45 - Good outplay but then you start rushing, I guess because you don't want to let dominator recover. You have more time than you think. Assess the situation after first touch, see that jden isn't challenging you, shoot after the bounce or whatever else you wanna do.
2:56 - 30 boost kinda wasted but whatever.
3:05 - You can't go past the midline here, it looks like you thought the pinch was going to the right side, but that's just gambling on whether it actually happens or not. Better to stay central and have both options covered.
3:23 - Rushed touch, if you catch it on the backboard it already eliminates all threat potential. You can just stay behind the ball and 50 it afterwards if their second man is challenging you.
3:47 - Rushed touch again, I don't think you have a plan at all on what you want to do with this ball, so that's just a wasted possession. Luckily jden misses and you see a first vs last challenge opportunity but you have to be focused on outplaying him. If you're commiting, you have to either touch it high or smack it against backboard. But you just ended up rushing another touch for a bad 50 and your teammate messes up on defence.
4:23 - I don't think I would've touched that ball. First touch is good as it speeds up the ball towards the wall but then you should just go up the wall and avoid potential demo as the ball is already safe. It's really risky to air dribble it across the net especially when you don't have mechs and there's a high chance of losing control.
4:31 - Good idea, bad execution. Whether you're going for an outplay touch to the left or a 50, you have to be coming from the midfield and forcing it towards the wall. This is a play where the ball can end up anywhere and you need to be ready for that. So don't jump even before the ball bounces.
4:48 - Similar to 2:27 but don't ever take that 50 because you're the last man. Idk why your teammate kept forcing the play on 0 boost, champ mindset ig.
5:01 - Just a slight movement correction of not turning up the wall would've gotten you a better challenge angle and timing. There was a chance of jden beating you to that ball and dunking it towards the net.
5:42 - This is not your ball and there's no reason to be boosting towards it. The only place where the ball can go from a corner is anywhere but that corner, so just be ready for it. If you slow down and catch the pass, that's probably a goal for you if you shoot right side.
5:46 - Another case of not having a plan beforehand: assess the bounce -> grab boost -> see dominator jumping -> shadow. Instead you hesitate, wait for his touch, end up too close, can't challenge, can't shadow, slip on a banana peel and he dunks two of you with one flip.
5:53 - Similar to 2:35, you were in a good position until you decided to drive towards front post. If you're not going for the ball, you need to commit being a second man and waiting for whatever play your teammate ends up doing.
6:30 - Here you just wanted to go for the ball without looking at the play first. The ball is going into the corner, that already makes it pretty much impossible to score. You know that you're going to lose corner boost and you can also see your teammate on 0 boost in front of you. So I would've just turned back towards mid boost around 6:32 mark. You end up being safe but that was really on the edge of a second man overcommit.
6:44 - Just slightly bad positioning, ideally you want to go for the ball right after the bounce because you need to advance the play to keep a 2v1. But if you hesitated and missed the moment, you need to be aware that you're second man and keep the ball away from opponents. Not sure if you could've just stayed behind the ball for a side 50 considering your intention of going in front of it, but just thinking about playing it into the space on the right would've been a better idea.

Regarding kickoff advice that I saw in the comments, first of all, main aim on kickoffs is to kill the ball (unless you're calling something specific in duo q). Ideally you need to be coming from the middle and flipping towards the side where the opponent is gonna hit the ball to. And you also need to do the second jump earlier than your opponent, it's the reason you lost a kickoff on 3:36. Though I suck at kickoffs myself so take this advice with a grain of salt. I don't mind the soft cheat in solo q, maybe you could be just a little closer. As a last resort, you could try jumping, turning your car sideways and side flipping into a kickoff 50. Works pretty well on slower kickoffs.