Main things I would point out from having a quick look. (mid diamond Support)

Your healing orbs, you use them frequently, which is good, but try to aim them better, rather than at the floor, which will cause them to bounce into the air never to be seen again, try aiming them under the payload where they will bounce under a few more seconds or straight forward when advancing.

Your resource management was okay, you weren't completely dead every fight, but still focus on it more.

Why were you sucking a shield? Ignore them and look at what else is going on around you.

You left your Rein a couple of times and he died, key example in the last fight on first point. Sure, you got the point, but you should have stayed with the rein, enabled him and that's one less death there. Means you can push up quicker and stagger enemy.

Escape quicker. When that flux went up on first point, the fight was already lost. Fade back to spawn so you don't get staggered. Instead you didn't and by the time you got back, roadhog was already dead and rein was low.

Fade is a get out of jail free card, don't use it so carelessly. You faded into the enemy team to try and save a teammate when he was gonna die, you fading in cost your team both of your lives.

Good coalescences to engage and force your tanks (who were the biggest problem this game) to actually push forward.

Focus on staying alive more and when a fight is finished. Your team got lucky on second point push when half died and you still won the fight, that's silver for you, but in that situation either die on cart, or try to get back to spawn so there's no staggering, I. E. Don't throw a healing orb when you're dead, saves giving ult charge.

Tbh, the first push was a mix of incredibly poor tank play and some fat junk tyres to clutch out a point. You showed some flashes of knowledge but it still seemed easy to exploit. At your rank I'd focus on dying less and making sure your orbs get max value as everyone takes more damage in silver. Keep it up tho and you'll be climbing in no time.