There is more to it than just that one thing. For example the way you set up signals is just weird and unintuitive. (eg I probably took 500 hours in game before I figured out what the middle row of panel switches were for, and they aren't signals as they have a partially-on state) The way The Take All is not always the same button in the same place. The way some things doesn't even have a take-all hot-key function. The way you sometimes use ESC and sometimes use F to exit a screen. The way the filters are set up on various screens and if, for example you re-enter the constructor it remebers some filters but not others. The way the Linked container can only be applied to the Left side container on the logistics screen but it doesn't look like that from the UI - the UI should make it clear. When you add more blocks, say concrete blocks, to a stack on your toolbar, they revert orientation and shape. Etc etc etc. I've learned it all and once you've learned and remember it, you can use it, but knowing a few things about UI and UX myself, this is one of the worst UIs and UX I've ever encountered. Sure you can learn it, but there is too much un-intutive about it. Hence it remains my biggest pet peeve about the game. My Nr 2 Pet peeve: How the Melee attack animation timing and range doens't match the time of taking/dealing damage, making it impossible to dodge.