What kind of mistakes are you looking for in your replays?
A few things I like to look for, starting with most basic:
-idle tc time.
The most obvious, try to keep your tc working as much as possible.
CA tracks it very well so it’s easy to notice when you drop the ball
-floating resources.
The snowball nature of rts games like this means spending your resources as they come in can lead to a huge difference later.
It’s especially tough to stay on top of this on open maps where you’re fighting frequently from early on.
-army idling.
If you pay attention to what your army is doing at all times in the rec, you might often notice you had them just standing around while you were tunnel visioned on eco.
Try to make note of where you *could* have attacked with that army, it will help you to more quickly commit your army to something in the future.
-bad choice of army comp.
Sometimes you might scout certain things from your opponent but neglect to process that info in the moment.
If you know you lost because the opponent reached a superior comp, try to watch with your own fog of war active and ask yourself if there were any signs from your POV that the enemy was working towards this comp, which you could have noticed and used to pivot your own army comp.