I didn't look at the story yet, because
@FrenzyWanderer was so kind in posting a snippet of your chapter, as it seems.
First of all: I'd agree with what he said about your writing style. It's important to find variation.
Going by what was quoted up above:
He turned, his hands finding his blades as water dripped from the steel.
He untied the twig-braided rope and put it in his mouth, the bitterness filling his mouth.
He flipped his left blade into a reversed grip. He slammed the blade into the wood, the bark shuddering from the impact.
He hopped off the edge, feet dangling. The other sword followed.
The bark spat splinters at Tenaro's face as he drove the blades into the wood.
And what he made of it:
"He turned, hands finding his blades as the water dripped, following the blade. Untying the twig-braided rope, he put it in his mouth — bitterness flooding the tongue.
Slam!
Left blade flipped--Reversed grip!
Bark studdering from the impact, as he slammed the blade on to the wood."
I'd say, yes, better, but not quite clean.
You also need to check for words doubling. The "Slam" is also something you can do, but use it sparingly. Because onomatopoeia often feels out of place or awkward, depending on how it is used. Here, it's not needed, because the word "slamming" was used right after "Slam".
In other words, I'd go for a segment like this:
He turned, his hands finding his blades as water dripped from the steel. The twig-braided rope untied, he bit down on it - bitterness filling his mouth - while flipping his left blade into a reversed grip. A moment later, it was slammed down onto the wood, bark shuddering (do you mean "shattering" or is that "blade" actually a pool noodle?) from the impact, as he hopped off the edge, feet dangling. The other sword followed suit.
With splinters being spat at Tenaro's face, he kept repeating his violent actions.
The reason for why this is not an action scene, is the fact that it is not an action scene. It seems more like he's trying to climb a tree or some shit. If not necessary, try not to use words with a lot of personality so often in a single paragraph.

I'm sure someone else is going to come around and correct me as well, which is fair enough, but that's as much as I can do for what I'm seeing. Again, I didn't actually look at the novel, but maybe I will do so later - or maybe I won't. That's my two cents anyway.