i do take break but don't have much time to do so
If you saved, you should really have all the time in the world. As in, if you save your story offline and came back to it every so often, you should come up with a chapter a week no problem. On the other hand, I've also heard of kids who would post a chapter a year or a chapter every few months (not that I would particularly recommend it).
So, yeah. If you want to do it, you should actually have time to do it. No one says you need to have a chapter out a day or even a week. Take your time. Do it in little bits and pieces. Post when you're finished. No one is going to demand that you finish your chapter as soon as possible, and if someone does, kick them in the shins.
On to your story, I really couldn't get through it, to be honest. First off, you need a beta reader (which you can find by looking at the stickies of this forum). I'm sorry to say this, but grammar, spelling, presentation, and so on and so forth are actually very important to your story. They make things easier to read for a reader, and they make it easier for that reader to take you seriously.
For example, while you're trying to portray a very dark and serious matter, you end up saying this:
When you meant this:
kitchen knife
So I end up thinking of this:
Not only that, but because there's practically no punctuation in this paragraph and because some of the sentences look like they're mostly stream-of-consciousness, it's hard to get a good image of what's going on. Following the kitten knife, here's what I'm imagining:
1. The attacker (A) attempted to slit the throat of the unarmed man (UM), but the UM dodged twice.
2. The UM blocked the knife attack, but the attacker kept going. Insert a few more arm blocks here.
3. The UM swung his arm up and hit the A with a vague attack which somehow managed to pull the bone... completely out of the man's arm?
Right about here is where I'd like to point out that research is always a good thing. Even if you don't think you have time to do it, it's a good idea to try even ten minutes of research on Google to avoid doing something that might be a bit cartoonish. For example, you can't pull a bone out of an arm, and an unarmed strike doesn't split an arm open. What happens when you have a broken arm is...
In general, yeah, it was hard for me to take seriously because, well, you really do need to take your time if you actually want to write. Beyond that point, the violence seemed gratuitous -- as in, it was violent for the sake of being violent. More specifically, however, it seemed like it was violent for the sake of making one guy seem badass. While I have no problem with gore in writing (*motions again to her fic*), it just seemed over-the-top. It was like watching a Jackie Chan movie, only with Chan's usual quirky I-am-a-kung-fu-geek personality turned down and more "I'm trying to be badass."
That and there's really no plot to it. The unarmed guy gets attacked for literally no reason. It's not even really a mugging. It just sort of happens out of nowhere. You don't really describe anyone in this scene, so it's hard to really picture these guys going at it. On top of that, you don't really set a stage or let us know even on a vague level who these characters are, so it's harder to want to actually root for one person or another. In general, it's just a random, one-sided fight. The guy gets attacked. The guy breaks out a can of kung-fu. The fight's over. Not much to see, really. *shrug*
So, in other words:
1. Get a beta.
2. Check your spelling and grammar before submitting. It matters.
3. Slow down, even if you think you can't.
4. Don't write gratuitously violent scenes that seem to revolve around making one character look cool. There's more to fiction writing than that. Let us know who these characters are and make them struggle for the victory. Even in kung-fu movies, it's hard to figure out who would come out on top. And, well, we're also given a reason behind why the fight is going down.