Just downloaded this, and didn't die in my first battle, even though we lost. I even shot somebody!
(read: I hid behind the corpses of my fellow MS-1s until somebody walked by, and I shot them.)
EDIT: I've killed one tank. In 11 engagements. Even with a srsly pimped out MS-1. I think that's the problem. It's still an MS-1.
And by seriously pimped out, I mean I researched and bought everything. I'm assuming I can't make it mechanically better anymore.