[ardent_uno]

I've experienced similar feelings, especially when faced with work that requires, as you say, "tediously assembling all of the glue".

Coding is most fun when you're working on solving a problem. Tedium is not problem solving, so it's hard to get excited about it in the same way that one may be excited by tackling an unsolved problem or undesigned architecture.

I would say, draw up all of the steps of your process, from most abstract to most detailed, and try to turn the work into a process more similar to putting together a set of Legos according to very specific instructions rather than going through a large but trivial mass of work.