im feeling the same way, i bought if off the steam sale but im always getting owned. im using a 2h with a good build, but blocking is so hard. it takes me 2-3 hits to kill other 2h and those same 2h will 1 hit me 
You'll get better
. We were all like that once, where those few kills were amazingly satisfying. I suggest opening up native, launching the tutorial and fighting the tutorial trainers in sparring. Don't swing back, just block. Just focus on blocking the correct direction, moving your mouse not at angles and not too far. Control. Work on your control until you can block for 2 minutes. Watch when their swing animation begins, look at the enemy character's arm and shoulder movements, not the weapon itself. You'll quickly be able to tell which swing they are doing the fastest and block the right way.
Then show up and you'll murder everybody before you know it! Swing as soon as you HEAR the block sound. That is the key. Try not to tap block or rely entirely on your eyesight. Hold until you hear their weapon bounce off your block or held attacks will kill you.
Once you get blocking down, which you will fairly quickly, focus on footwork. Step right when you swing from the left so your attacks hit faster, etc. When you see them step after they swung, Swing
from the side they are stepping into and you'll hit them so fast and get that beautiful speed bonus as they hurl themselves onto your sword.
Never hesitate, ever. Hesitation is death in all video games, especially here. Always remain relaxed and level headed, getting crazed, mad, confused, etc will tilt you and you'll play worse than you are.
Getting attacked by three people at once? Relax, clam down and watch where they are swinging, block them and step in ways that only one can swing on you and the rest will hit their teammates and so on. Best of luck my friend.
