I think I've come to a point where I no longer worry about the lack of creativity since experience can help you push through some of the lack of content you may find you'll have with a song.
I do want to point to a website that I posted in the NGADM discord:
If you find yourself having trouble during any step of the music production phases, I suggest you to read up on some of the topics introduced, and practice in the areas you feel you are weak in.
I think for myself, the hardest thing I used to have trouble with was coming up with a melody when I finished working on mainly the chorus, and reading this guide, I realized that the melody is one of the first things you should work on in a song.
You crafted a beautiful sounding bass-line, and you have all the other parts working together. A melody should come simple right? No. It doesn't, and I've had to stop songs because I didn't come up with a good melody that could fit the song. Once you develop your statement with the melody first, everything else comes pretty easy from developing the bass-line, to the rhythm that the song is going to follow.
All of the processes are mechanical, but it does help quite a bit with the workflow and seeing how some artist can come up with great melodies on the fly versus the artist that struggle for months to come up with a few good songs per year.
That my suggestion.