If you're not having fun right now I'd advice you to quit now and re-make so you don't waste any more of your time.
If you're having lag problems PVP is only going to be much worse. As Guardian you need to hit a lot but hardly get hit in the process because of our lower defense compared to other knights.
Plus if you got the punching skill you need to get rid of all the points in there or remake.
So I hope you can jump climb and fast on your feet.
Good practice would be jumping and pressing z to punch down and hit monsters.
Just right at the moment they're about to strike to dodge then punch when near the ground to do a high damaging punch of them.
If you get good at that then you have hope for PVP and higher level monsters. Doing that once in a while in the mist of battle is very helpful.. especialy when grouping up foes.
- Man I should really get back to work on my guide -