So vanilla SupCom was not a particularly well balanced game (not faction imbalance specifically, but even within a single faction there was stuff that was dumb). One such issue is air, specifically, T1 interceptors being too fast for T1 AA to kill, making their only counter either higher tier stuff or T1 intis of your own. Now, in a regular game that won't be too much of an issue since you've got access to all of the tech. In the second mission of the first campaign tho, you don't, which means the only way you can kill the enemy intis is with your own. Here's the kicker tho, the enemy starts with a swarm of them near your base, and the moment your build your first air factory they keep getting more, and they start patrolling your own base, so anything you build will get sniped fairly quickly without doing much of anything. They'll send in swarms of bombers too, but those are fairly slow and easily dealt with with AA, the issue comes from the fact that you have 30 minutes to build an air transport and ferry some engineers over to the other side of the map or else it's gg.
I am yet to figure out how to deal with this shit, other than maybe ground spam to murder their production base, but even then, I'm not sure if one is in the play area or not at the start which would make that kinda impossible :V