It definitely showed in the Kuvira duel. Korra treats every element as a simplistic ranged attack while regular benders like Kuvira learn to make the most of their ability, being able to attack from all directions or make subtle changes to the fight that throw off such an aggressive approach. Korra's water bending is slightly better, likely from growing up as part of the Water Tribe, but she seems to treat every other element as the same kind of ranged attack or mobility enhancer.

I don't think I've ever hated a fictional character more than Kuvira right now. Also I don't think I've ever liked a character more than Varrick right now. This has been a strange day.

She is by far the worst airbender I have ever seen, and last season I saw people that have been airbenders for mere weeks.

I was hoping she'd have learned something from getting beat up by Toph.

"I've completely mastered Airbending, look! PUNCHPUNCHPUNCH! See? mastered."

But I feel like Toph is literally the worst person to teach you airbending.

To be fair though, she hasn't had the chance to really work on her air bending all that much given everything that's happened.

Plot hole I noticed. So he was trying to use the spirit vines to create clean energy. The electrical grid is powered by benders. They already have clean energy

Likely he's trying to create a power source that doesn't rely on bending that'll net him a few millions.

Are we sure that the electrical grid is FULLY powered by benders? what about Satomobiles, Boats, planes, Tanks,mechs, and airships?

Yeah those all seem to be Gas powered or Steam powered.