This is just me, but:
If I care less about what I’m doing, and just have an urge to make a sound or some music, or even just sit and play just for fun, THAT is when I come up with something decent.
If I have some spare time, and decide that I’m going to sit down and make music/sounds/whatever, and then force it into an “I’m going to do this” sort of thing, it will not typically turn out very well.
So, my gear sits largely unused a lot of the time, and then all of a sudden, I’ll have some idea that I want to try out, or just feel creative in general. Those are the times things work out better. A more natural flow of that creative energy, and I care less about making something cool, and more about just getting absorbed in the moment.
Maybe take a break just long enough to where you get a feeling that you want to do something, or some idea pops into your head. The quality of output might change based on a different frame of mind.
Also, my opinion is that all the sounds you post here are really cool. Maybe you’re just being too critical of yourself.
As far as just basic mixing and sound design to make things fit together, there are some pretty cool videos on YouTube about all this. I tend to like Oscar / Underdog. He usually presents ideas that I’m already familiar with, but they’re good reminders, and he has a slightly different approach with some things than other people do. Also check out Ken “Hiwatt” Marshall’s videos. He mixes a lot of Skinny Puppy tracks, and has very good tips. He’s also always super excited about everything, and it rubs off.