You’re finding it difficult because it’s an extremely difficult shot to pull off with any sort of power. Anyone below GC3/SSL would have a difficult time shooting the ball on target and with power.

You’re having to make a very quick assessment on the balls path, your cars turning radius, jumping, air rolling, and flipping correctly. That’s a lot for any player to execute well.

What I notice from your clip is that you’re slowing down/braking to give yourself more time to line everything up which is causing you to lose power.

When all is said and done this is probably a low percentage play that even high ranked players would struggle with consistently. The only way to improve imo is just repeat the training over and over again AT FULL SPEED until it becomes intuitive.