Demonic piece of software. Once I had to pull up a calculator, Google Docs, pen and paper, and start drawing blueprints, I knew that the worms had infested my brain and that The Fog was drawing ever closer.

This is still in early access, so I assume the devs are fully aware of all the problems, but I'll throw in my two cents:
• The map is too big and too empty. There's a lot of interesting biomes, but zero reason to explore. Having to travel longer distances for resource nodes is a waste of time and a glorified loading screen - you will not find anything on your way to your destination, and nothing will kill you.
• Enemies are barely a thing and only serve as minor annoyances. The game throws some pretty cool weapons at you, but you don't have any reason to use them, since everything dies with 2-3 hits from your laser sword anyways.
• 99% of the factories are the same thing. They don't get more complex and satisfying to build - they just get bigger and more tedious.
For the final few products, I just started putting down a bunch of overclocked Manufacturers and feeding them manually, because factories for stuff like Supercomputers are insanely hard to optimize, and way too slow even when fully optimized.

Noped the fuck out once I calculated how long it would take me to build all the Phase 4 Space Elevator parts.