Half year with MacOS, yet can't do basic stuff

I really tried to learn and customize it, but gosh, if MacOS hasn't worst file management and window management in whole IT world!!! Inconsistent, maximizing window? No, either full screen or maximizing even make Safari window smaller! Spread vertically but horizontally it gets just thin nuddle on screen. Doing some basic stuff with files? That's big no no. Keyboard? Useless device, as system shortcuts are as useless (not that hardware of Mabook keyboard is better). Splitting windows? Working with workspaces? Having multiple monitors? Good luck if you don't smack it with hammer. How can someone design such terrible thing. The UX is at level between useless and better to throw to bin. Even fucking Windows 3.1 or first DEs in Linux or BSD had better UX.