Halberd Heavy Attacks

I really enjoy halberds in both Elden Ring and DS3, but I’m having issues with the 2H heavy attack. In ER it does a lot of stagger and damage regardless of enemy spacing, and I’m finding that the double spin is pretty weak when I use it in DS3. I know halberds have a sweet spot but it seems like whenever I do the double spin the enemies just get tickled and then hit me while I’m locked in the animation. In contrast the 1H charged heavy hits hard and does stagger regardless of spacing, although the sweet spot definitely hits harder.

Am I messing up my spacing or something? Why does the 2H heavy feel weaker than the 1H heavy?