The guy in this video is only level 5. Nothing credible about this criticism. Come back when you've invested more hours into the game and make the same statements. I've already invested well over 100+ hours and I would disagree with most of the points in the video that he makes. There are issues with the combat - that I'm certain of - but he doesn't mention any.
His first point about the soft locks being broken just isn't true. Yes, it is annoying at first - attacking an enemy only to leap to another without intentionally doing so - but you get the hang of it in time. The enemy that you attack with the soft lock depends less on the camera direction and more on WASD. Ex: If your camera is faced to the North, you have an enemy on your West side, and an Enemy to the East, pressing "A + M1" will attack the enemy on your left, and "D+M1" will attack the enemy on your right. This is incredibly useful when fighting groups of enemies as the AI is less likely to dodge attacks when they're not being focused - switching up and attacking various enemies within close range and not just focusing on one enemy at a time is highly effective because of this.
His second point about the human AI just standing there mid-fight was definitely a valid point. That obviously shouldn't happen; but in my playtime so far I've never encountered that situation, so this may have just been an odd circumstance or a small bug. Usually when they start to group up and rally, they will send one enemy to you at a time. Although, this isn't usually the case. Most of the time the group will just attack you as a whole.
His third point about the repetitiveness of parrying then striking was dumb. If you stand there and use the same move over and over, of course the combat is going to be repetitive. I think what he was actually trying to demonstrate was that there wasn't another way to attack the human - i.e. that he had to parry in order to open him up for an attack. If this is what he was trying to say, it simply isn't true. There are plenty of ways to open them up and attack - 1) Any and every sign, 2) Dancing Star (light on fire), Grapeshot (to weaken shields and groups), and just about any other bomb aside from Moon Dust etc., 3) Hit with a light attack mid-swing (if timed right, you will be able to land a hit on a human mid-swing if you can anticipate it), 4) Turning humans on each other (with relevant perks in Signs skill tree), 5) Luring guards in line of sight of an archer, causing them to be unintentionally struck in the back by an arrow (my personal favorite), 6) Making use of explosive barrels in the environment, etc. etc. etc... If you're going to stand in one spot, press two buttons, and then whine about how the combat system is boring and broken, then that's a pretty shitty review. Play the game more and then come back once you have a better understanding of it.