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:
And what he made of it:
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:
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