I feel your pain bro, the same thing happens to me, there are times when I spend hours looking for the right music for a scene and what I have in mind does not match what I hear and even less with their copyright law. I'm looking for no copyright music and it seems that all the music is made by the same guy, since it's repetitive and not at all attractive.
Regarding the composition of a scene, the most important thing for me is to create the atmosphere of a scene with sounds that enrich it. It could be music that can be heard in the distance, perhaps the sound of soft rain, the blades of a fan, etc. Sometimes the most casual scenes are the ones that have the greatest impact on the viewer. It just happened to me with
chapter 4 of
Exchange Student, a random scene was the one that caught my attention the most and it wasn't even a sex scene, I thought of putting the protagonist lying face down while holding her smartphone receiving a call from her husband while lightly swinging her feet and playing very soft relaxing music in the background. So, a simple scene without much plot but it stayed in the memory of several of my viewers so it's not so much about racking your brains looking for the best piece of music but rather the spontaneity and simplicity, I think.
PS: I don't know if the question was for me but I liked the topic