Yeah...and this highlights one point that I've gotten some crap for: YouTube is NOT the right place to shop for modular gear. You have to keep in mind that, in lots of cases, reviewers on YT have a vested interest in telling you how absolutely WONDERFUL this new module, etc is. Granted, this has been better as of late since YT started mandating that presenters have to disclose any compensation gained through a company relationship, but it still exists in older clips that predate that. It's better to see what things do on YT...and then check with actual users as to whether those things are all that useful in the first place.
As for the build above, well...you're going to have a ton of trouble controlling a modular synth with no VCAs...unless you've got several extra hands to control levels while the other two are working the OTHER controls. And fyi, Walgreens has a great selection of tweezers to go with the Pico system's controls; that device is irritating AF due to the rotten ergonomics that jam everything too closely together. Put THAT part of the build back in its own case where it belongs, as having it in with the rest of this flirts with creating a big patchcord snarl on the left end of the cab. And that should open up some space in this build.
If you've not worked with VCV Rack, I strongly suggest that you do so before buying anything else. That will give you loads of insight on what went wrong here, and how to correct it.