To be fair most of the picture is just automation.
+1
One reason why everything sounds so cohesive is because he's only using what he needs to use, there really aren't that many instruments or sounds happening all at once. The sounds aren't just some random presets he found and threw into the song, careful consideration is taken when making the sounds and deciding where to fit them in. The sound fill up the spectrum without clashing because they're each assigned to a different part of it. Unless you're layering sounds on purpose, it makes no sense to have two bass sounds or two lead melodies playing simultaneously. The automation makes sure everything fits together over time.
A lot of this is hard to do objectively so of course the amount of time he puts in plays a large role too. He's someone who puts literally hundreds of hours into a single project and has thousands of hours behind him in experience.
Music at this level only comes with hard work and crazy amounts of dedication, but always trying to better yourself with every project you take on. As long as you focus on making every track even a tiny bit better than the last you'll get there eventually. Just gotta put in the hours
