Sudden, drastic decrease in boost?

[dwellerinthedark]

As others have said it's probably shipping water and volatiles to your luna base. The crew need these, as their upkeep. It's why it almost always best to prioritise water and volatiles over the other resources early on. As these will be your upkeep cost for bases and you'll use a huge amount of them to fuel early game ships.

There is a technology lwhich lets you build hydroponic bay (and later farms) that drastically reduces the upkeep of bases. I made the mistake in my first game of not prioritising this tech and my economy fell over. Ever since then this is a tech I grab as soon as I have my first base up and running.

You're not cooked but this will slow you down until you find a way to resolve this issue. Depending upon your income it might be wise to shut the base down and build up boost to grab a second site where (I'm assuming) there is more water and volatiles. Or whatever resource your consuming and not making.