I had exactly the same issue.
A few suggestions from an average player who was crap, just what I found. Many will say its bullshit but just based on my experience of this mod:
1. Go to nditions duel server and practice blocking versus the trainers until its as instinctive as possible.
2. I realised switching from 1h no shield to pole to 2h if you have a reasonable amount of agi dont be afraid to spam. If people complain its up to them to block, their lack of blocking is not your issue. Of course trying to spam the good guys just gets you dead but funnily enough the guys who are easiest to spam and complain the most are generally spammers themselves, ie they cant block then counter consistently.
3. If your weapon is longer than your opponents try backing away and left/right swing. As long as they dont over athletics you too much its quite effective if they chase you - ie S key spam. Same as you do to bots on DTV. Can be decent defensive tactic versus a good 1h who have heavy shield and may not have huge ath.
4. Always have 18 plus AGI with max ATH and WM. I do OK at the moment with an alt Weebo with a low AGI but you have to block alot. Like 2 to 1 at least blocks to attacks.
5. Dont hybrid. Many players are lvl 33 plus dedicated builds how the hell with the equivalent of a lvl 24 or so 2h do you expect to compete with a fully loomed dedicated lvl 33 2h whos logged 5000 hours (im not joking these guys exist). Wont happen. Some people will say being high level makes little difference, to someone like chase maybe not but to most of us it does.
6. Kicking is hard to master. Chambering is hard to master especially versus quick varied attacks or feints. Footwork, held attacks and feinting are comparatively easy to add. Dont underestimate held attacks they really add to your game, if the guy chambers well done him, most will fuck it up. Of course you need to be confident in your release timing or ability to switch to a block if necessary.
7. Vary what you do. I got killed with my slow guy by a 2h spam feinter, next two times I fought him simply stepped in and killed him while he feinted like a madman. Of course he raged about spam, luck and I only kept killing him cos I am so crap but thats his problem if hes too stupid to realise what he was doing. Of course if I didnt mix up my tactics he could counter. Dont be too predictable. Some guys always start a fight with a left swing for example.
8. Weapon choice. Either use a pierce or knockdown weapon or one of the uber weapons . Versus loomed armour blunt/pierce damage makes a difference to being able to hurt the guy, plus with a knockdown 1 hit and if he fucks up his AA/DD you get a good chance of an in effect 1 hit kill. The uber weapons. Some weapons are simply easier to play. 2h longsword, pole long axe are in my opinion easy due to extreme speed, 4 different attacks and goodish damage. Combine with 21 plus agi and you will find blocking and getting attacks through easier.
9. Sounds cowardly but be a coward. Doh! Recognise the top players. Avoid them for now. Also if clan ganks are on avoid them, unless you have clanmates with you if you run into a group of mercs/greys/drz with 6 teammates you will suddenly find you are on your own, no chance of doing anything. Sad but true.
10. Never assume teammates will help you. If they do help you consider it a bonus. If someone tries to help and hits you and you report he will likely not help you again. Acknowledge/thank when guys help, a simple held up block after fight can do wonders for getting guys to help you again. If someone does help you keep an eye out and try to return the favour. I dont mean wading into a 1 or 2 teammates versus an enemy, I mean when he is outnumbered or trying to run down an archer or defend versus a cav. Help when its hard, not when its easy.
11. Go 1h no shield for a gen or two. Does wonders for your blocking, then you will find 2h relatively easy afterwards. Can be frustrating but effective in a confined space. Plus its fast and fun.