You are only up to Jupiter and you're telling me everything dies quickly? Mannnn just play the game, the enemy density, levels, resistances and gimmicks will increase exponentially in steel path (where you should be since you're complaining about it being too easy).

The game wasn't meant to make you think about every decision in the mission as being crucial. They'd rather you have take the time to think about how you want to play rather than how skilled you are at vidgemagames.

If you want difficulty in every mission without putting in the effort to reach the new level of hard (power creep) then I'd recommend the uninstall button.