If you want to get better, quit watching pro replays. Watch your own instead. Here's a guide from Day[9] about what to look for in your replays.
http://day9tv.blip.tv/file/3991475

I've gotten a lot better since I started looking at each replay and seeing what I could have done better. Especially if you lose against an early push, it's generally fairly easy to figure out where you went wrong.