I can definitely say I also have lots of trouble doing those things like adding references to my lyrics. Like, I really hate wen what I write is just straight, exactly as it sounds or what-you-see-is-what-you-get kinda deal. But when I TRY to add allusions, they suck.
I wrote this one song called 'Reply' (some may've heard it) that a LOT of people seem to like. That's the ONLY song that isn't 100% word-for-word, being that the whole song is about references to various social media. Additionally, the song came easily- I wrote and recorded the bulk of it in about a day, no problems. Additionally, it was a really simple song.
When it comes to taking random things and comparing them in unlike (or even similar) ways, I just CAN'T DO IT! WHen I write songs that aren't ABOUT anything in particular, they end up being NOTHING at all! I recorded this song called 'Butterflies', and in the end, lyrically, the song meant literally nothing- it has a massive heap of unrecognizably unrelated lyrics that just happened to rhyme.
I don't know if the key is to replicate my upsides, or to try something different every time? I for sure do need to give a schedule a try.