I played bass for a church band few years ago.
The director was the piano player, he had also toured with a band called The platters. Might have done some recordings, but not to sure.
Any ways, what he said was that, with music you'll come across these plateaus in learning and understanding and that each pleateau represents the entire range of skills/techniques you have learned, applied, and practiced that are now in your tool box.
You've acquired all these skills and what you should be focusing on now are the things that might be a bottle neck in bettering your understanding.
My suggestion:
IE, it might be time to brush up more on your playing, music theory understanding, technical understanding of what ever effect/synth you use, it also might mean to upgrade headphones/speakers/mixing room.
Also consider this. You are at a point where you could make this your career and you might want to figure out where you want to go with it.
You might think that shouldn't be apart of the process, but it's a real deterrent to doing things if you've felt like you've mastered the process and understanding. I got that way when ever i reached a certain point in world of warcraft with leveling, getting geared, and mastering a new healing class. It just becomes a giant hamster wheel at that point.
But you've already made the investment, so only you are stopping yourself from making music.
If we're being honest, it sounds like you should just be making music for yourself and when you want to make music should also be for yourself.
Unless this is your job, then there's no reason why you shouldn't be chill about it.
You almost sound a little like me, and what i realized was i am completely comfortable just taking this thing in stride and really enjoying the entire process of making music.
This comes with a reevaluation of WHY i do the music, more so than when ever i started.
Consider the mental aspects of doing things, and you might find new inspiration.