Girdeux: I'm playing on Medium, and unless there's something unintended going on, the game single player is really poorly designed. The Campaigns are mostly fine (there are some horrific parts, especially level 7), but I've stopped on the second Galactic Conquest stage.

The enemy AI is always better. They aim better, they throw grenades better, they move more, they always try to capture command centers, they always drive vehicles, they always are better at them.

1:1, allies ALWAYS lose. They aim worse, they're worse at throwing grenades, they tend to stand still looking at walls more, they won't capture a base even when it's right in their faces, they won't use vehicles unless the command center is taken, even then they take longer to use them and are worse at them. If you leave a vehicle, the enemy take it but not your allies.

If the narrator says Defeat is imminent then it is 100% certain, but if they say Victory is imminent it is not, the enemy can turn over the situation. There simply isn't enough time to kill enemies to undo the mess of your allies at the stage I've stopped. I haven't tried Easy yet, but it's mathematically impossible to kill them fast enough, the enemy will win with 40 or 50+ more units, it's ridiculous.

EDIT: So I tried again with Easy and Hard settings the stage I was in, Kayshyyyk on Dark Side Rising. On Easy, allies could hold things on their own and it's possible to win. Hard on the other hand, even trying to get ahead as fast as possible, securing a base and finishing off foes as quickly, they'll still destroy your team, as much as 100+ difference!!! This game was NOT balanced for every setting, definitely not.