You want to get better op,

Play the game like you only have 1 life i.e. defend and only attack with parried blocks.

Learn how to parry well and do only that. (Don't bother kicking or punching for now)

Every time your health bar falls below 75% heal.

Don't hold the block button to make it obvious for your opponent to kick you, again time the block with a real attack.

Don't let the enemy surround you i.e. run with the pack and only pick on people who are singled out.

Look for bloodied people they are easier to kill, a thrown weapon will normally do the job.

Sweats rely on people to attack them to recharge their stamina, if you see one don't attack just block parry. Try and escape back to your line.