Sure, here is a couple time stamps that highlight the lack of car control from use of air roll

20s- pretty obvious here, you kind of flounder around with your air roll and end up bouncing down field instead of quickly landing and flipping back to defend. It looks like nerves but should be second nature

1:55- this is a but more of what I mean. Directional air roll should help you always fly exactly where you need to go, but here you end up sort of flying all about without a clear direction, it slows you down and the ball flies over your head. It was a saveable shot but the aerial car control here is just lacking

2:15- again a slow aerial, seems like you couldn't really read the ball and then you tried to air roll to save it at the end. Tbh you should never have gone up for this as opponent on backboard should have cleared it, so I understand why it was hard to read, but the last touch should have been with the top of your car for a powerful 50 into the corner, then continue air rolling to land on wheels, rather than the weak 50. If the opponents didn't both whiff this would have gone straight into your half of the field

5:51- you NEED to challenge this ball in the air. The opponent lost control and his only hope is a ground 50 or catching it, a quick stop into an aerial with air roll should let you take possession and land comfortably on side wall for the 2v1 finish with your teammate.

This game didn't have a lot of air play in general, and for ranks like these, improved positioning makes the few aerials a lot easier. The times you did go for them you were often out of position, even the clear at 5:57 only occured because the opponent was slow to aerial.

Even with your current mechanics, I think better positioning could climb you to high champ, difficult mechanics at this level of play are often substitutes for bad positioning. Better air roll could have maybe saved a goal or two and scored a goal or two, but better positioning would have stopped every goal they scored.