I would say that what is already available for linux is far better than what adobe has for image editing and video editing. Nuke and Houdini are much better for editing images than photoshop. Davinci Resolve is a much better video editor than premiere. Painting and vector illustrations are where Linux doesn't have good alternatives as far as I know. At this point there are multiple web based image editors that are far better than the low bar that Gimp sets. Gimp is a relic that most people would be better off forgetting about.
Krita is wonderful for painting and other applications like that. But isn't a full photoshop replacement. It is pretty heavily focused on digital painting.
One of the most annoying UI design features to me is multiple ways of doing the same thing on the screen at once.
Windows 10 does this endlessly. You can use the taskbar to get to your files, you can use the Start menu to get to your files, you can use the tiles in the Start menu to get to your files. This actually makes it far more confusing when trying to quickly get to your files. At least on macOS there is one single button to get to your files (the Finder icon).
If you've ever used Maya you'll know it's the same thing. The layout is incredibly overwhelming and when you want to quickly and effortlessly switch to a different tool, you have to think about what button to press. I switched to Cinema4D as their design is simple and very intuitive.
Good UI design to me is about having labeled buttons that have a depth of interaction, rather than putting all the buttons on the same screen at the same time. Obviously you don't need to abstract away menus all the time (like the proliferation of pointless hamburger menus), but at least cleaning up buttons makes UIs more usable.
I use a bunch of Chrome extensions to block out tantalizing content.
I use StyleBot to remove all YouTube recommendations and home page videos. I use Web Time Tracker to see how much time I spend on each website. I use BlockSite to block out YouTube, Facebook, Twitter, IG, etc -- I still go to the websites in Incognito but I am forced to log in every time I want to look at content.
I also have insanely long passwords which makes it even more of a pain in the ass to get to the content.
Friend of mine created a parameterised font for his master thesis. We hooked it up to a face expression sentiment analyser (pre trained DNN). It works in the browser with your webcam, better to use a laptop or pc :)