A big part of the problem lay in my writing technique...or rather lack of it. Aside from being a pantser, I also don't write linearly. Which kinda makes life complicated when trying to write a mystery that needs you to keep track of who dies when and how, so that you don't have characters having a conversation when one of them died ten pages back or after a particular clue has come to light, only to become irrelevant in the next chapter. There's also the issue of putting star dates at each new chapter, only to discover you skipped a day or got your numbers wrong. And then there's the original mental block of not being able to write Christmas in Spaaaaaace...except I manage to overcome that a couple of years later and release it officially last year.
But if you're looking for something a little more heartwarming, you can always check out my post from last month with a selection of seasonal scifi romances here.