The game was incredibly easy in the early stages as I stacked these things: battery, massively efficient weapons >200%, and health regeneration. This made me unkillable until around Elite 8. Now I can't find better technology that I can afford, while the ships around me are vastly improving, the rare ones are sometimes one-shotting my 7k hp (low, I know) ship before my massive regeneration even makes much of a difference. I can't find sturdier ships with a decent battery to sustain my 5k dps. What do I do? I'm thinking of getting a cargo ship to run around doing collection missions until I can afford one of the 40m Cobras.
How to win: Play just killing robots and staying alive, ignoring the box. Upgrade until you have the shotgun, 2 Big Power upgrades (more damage) and whatever else helps you, like accuracy or reload speed. Then die, and start over with the shotgun and upgrades at wave 1. This time dodge/ignore the robots and mainly shoot the box. Don't let bullets go to waste and don't stop shooting. Sometimes the robots will pile up and it's worth it to shoot at them to get them out of the way/survive.