This short snippet sounds extraordinarily well produced! I don't know how you compose or what kind of process you go through but for me listening to my composition while I'm composing is a killer of creativity. I get excited about how good what I already wrote sounds and then I get intimidated by that when trying to continue my composition. I don't know if this is what is happening to you. You say you have trouble coming up with "decent sounding ideas". A solution to that from my perspective is to divorce yourself from the sound and compose in a venue where you don't hear everything you write immediately. This might (as it does for me) let your musical imagination run free and unencumbered. I hope that helps!