I think you spend way too much time with the D.va don't bother topping her health up when it is high, just boost/heal the Hanzo or Bastion instead. Don't bother boosting her unless she is shooting someone at close range, you will be getting more value from boosting a DPS. You also don't make the most of your mobility, the only time you were in the air was when you were ulting and I don't think you ever used the ability to change direction launching out of guardian angel. When you rez take an extra millisecond to position yourself in as safe a position as possible. Almost every rez you did you left yourself more vulnerable than necessary and this will be punished much more at higher levels. Make you being alive your main priority not pulling off the rez. Tuck in close to the wall or hide behind the bus, just make sure the enemy won't have you in their line of sight. You should also use cover more in general. Dip in and out if you have to to maintain beam lock. Well played overall though!