I'm sorry to say, but the Zerg and Protoss episodes were very awful and I don't have anything positive to say about them.
• I played the rest of the Terran missions and it was mostly just us controlling
Commander Sturnn (Alexei Stukov), with the objective of going from point A to point B. For the most part we can simply cloak and run to the end with no opposition. After this mission, our hero ghost is now Samir Duran, for no apparent reason.
• In the Zerg episode, you only reused the same maps. The first five missions are us controlling Samir Duran—who is now infested, we don't know how—and we are basically backtracking through the Terran missions. Again, we can simply cloak and run to the end.
On Mission 6, Samir Duran is surrounded by Terran infantry and is killed if you don't cloak him fast enough. His death doesn't cause a defeat, though, and he appears alive on the next mission regardless.
On Mission 7, we must destroy a number of Command Centers scattered around the map. Seems alright, until you realize they are defended by hundreds of missile turrets with 2000 HP and 20 armor, as well as goliaths with 33 armor.
It took around 10 minutes to complete with 40 guardians and the invincibility cheat code, so I can't imagine how you expected anyone to beat this normally.
The rest of the Zerg missions is just tediously destroying Terran bases.
• In the Protoss episode, almost all of the missions are the same "find and destroy the Zerg Cerebrate" type. Once again, we are playing the same maps.
I think I understand what you were trying to do with this, as the campaign takes place on one planet. But it just didn't work out.
It's clear you're fresh in the map-making scene, and you're not experienced enough to have a real idea of how to make a quality map. You need to spend more time creating maps and experimenting with stuff before getting involved in a public release.
Experiment with every single thing available in the editor and see what they can do. Open other people's maps and look how they're made. A good way to learn something is to try copying other maps.
But like I said before, don't try to become a good map maker overnight. It takes time. I've been making awful rubbish for a long time myself before something finally clicked in me and started to realize what I was doing, and learned from my failures. I'm sure we will all be happy to help you with your mapmaking, but a public release is probably not something for you to take on just yet.