Hey I watched the game and can give you some trends I found. Usually I do videos, but the game was 30 minutes so it would be too long.
- Greedy play. You would often use boosters to go in straight down the middle when your team was down players or when the other team was grouped up. On defense shortly after they capped second, you basically went into their spawn and used your ult, and Doom finally punished you by punching your remech, giving them free payload push. The other team started grouping up and reacting to you as the game went on, so you had less success. You also flew after an ulting mercy at least twice trying to kill her, and when you didn't kill her you landed in a bad spot and took tons of damage. I say greedy because you aren't a feeder that 1v5s and you sync up with your team, it just looks like you got your confidence up from the good plays then slowly take more and more risks until eventually you do something dumb.
Once the other team starts turtling up, you need to slowly surround them and go slow, wait for your dps and slowly force out their abilities before you actually send the booster play. On attack 3rd point you also got demeched going too deep for cleanup kills, but you didn't ult for the new mech. That absolutely killed your teams momentum (and timebank)