When did you use a Mac last, 2010?

You can run nix on macOS now. You can also drag windows into corners or edges to tile them, it is almost exactly like Windows 7 or 10. You can even have tiling window managers on macOS that emulate i3.

Your complaints with the dock seem like a personal choice... I like the dock behavior but if you don't, probably not a lot that will fix that, it will always suck.

Sad to report that external monitor support is still terrible.