No, that others have reported that mission being extra difficult as well. We'll probably make that mission simpler or come later in the campaign.
On that level the houses and farms that you start with aren't really adequate for the economy you need. You need to start with building an extra community center and an extra greenhouse and farms (at least). If you have lots of credits you'll be able to build lots of mines and enhance those mines and build plenty of trucks (as the mines are all pretty far away). You'll need a lot of ore to defend on four fronts.
The way I approach defending that level is to use the pheremone traps to get the aliens to cluster near a few places on the map, and then only defend those spots, not even building walls elsewhere where the aliens won't come. And I use the resources I save from not defending everywhere to build extra thumpers (which slow down the aliens a lot). Of course you need a fair bit of power to run the thumpers, I'd recommed getting at least 2 tritium reactors.
The most recent build I think did make that level a little easier, I'm not certain exactly which build you're using.
Coconut Mouse beat the level like this (in an older build):
Don't know if that's what you're struggling with though?