Have you ever had a dream where you're trying to run, but for some reason you just can't move your legs very fast and it's very annoying? I think you know what I'm talking about, you can see where you want to be but you just can't get there.
This is the problem I have with Starcraft 2. I have great game knowledge from watching replays/live casts, reading wikis/strategy guides, and I know what I could use for victory, but I can't seem to actually make it happen very well. I tend to always get into a reactionary mode and then everything becomes to overwhelming.
There are two main factors that I have found, one is camera control and one is just overall control in general, meaning knowing what/when/who to click.
In terms of camera control, this is the worst limitation. I can only view a small window of the entire map at any given time. However, I need to be controlling everything at once. This is a real challenge. I use hotkeys so I can build units while out on the field, but there is a major gap in the ability to reinforce. If I'm staging an attack and building units in the background with hotkeys, there needs to be a time where I switch my view back to my base, rally up my new units, and add them to the battle (if I just set my rally points to the battle field I would have no good force back at my base and the units would be trickling across the map). However during this time my vision is no longer on my attack force which causes major problems. Of course during this whole time I should be teching up and expanding, like I said, it's like those running dreams...
So beyond where I should be 'looking' with the camera, how can I get better at controlling everything, I always feel like I am one step behind my army. It's as if instead of me happening to my base/army, my base/army is happening to me. I can't seem to feel like I'm in control but rather like I'm trying to lead a class full of 3rd graders through a museum: I know what I want them to learn and what exhibits I want to make it to but half the kids are trying to run off and climb on things, and there is only so much time in the day.
I hope these are good analogies of what I am trying to describe as it is kind of hard to put it into words. I know Starcraft 2 is a game of constraints, but how can I take advantage of them instead of being hindered by them?
I found a replay where the players seem to have really good control and tend to utilize the camera very well.