@dddx Could you try easy difficulty, if that is also too hard?

You could also post the replays, I could see much more of what happened and why from the replays.

First Aeon mission is a full naval map, so not sure how you managed to win it with 3 tanks...

Reclaim is a pretty big part of this game and using it will always give you significant advantage.

Aeon campaign can't really be compared to other campaigns and the other ones didnt go through the rework yet.
The balance of the original supreme commander was very different and the missions were reflecting it. You got one attack in 15 minutes so there were even reports about some missions being broken. I shifted it the other way around a lot. And hard difficulty can give a challenge to better players as well. That means that medium difficulty got also boosted.

Im not saying it's perfectly balanced, I've never played easy or medium difficulty as I can't judge how difficult they are. And I also got minimum feedback for that. Mostly switching ti easy difficulty was enough tho.