Ummmmm . . . I dont think you are saying something that you thought through. OSX is by far easier than windows to navigate between windows and applications. I would recommend looking into how to use hot corners, gestures and Mission control.
Example: I have mission control set to my lower left hot corner. Simple swipe to that corner instantly shows me all the applications I have open and allows me to select from any window in any application with one click.
Also, I don't really use apps in full screen but a lot of people do. Three finger swipe to get to any full screen app . . . thats pretty dang easy I would say.
Both OSx and Windows do things different, and some things OSx does better than windows, and some things Windows does better than OSx
Windows management for example: Actual windows placed on your desktop that are open and visible is easier to do and use in windows. By default, Windows includes many window display management routines. For example, Windows allows you to snap your windows to portions of the screens by simply dragging them to that portion of the screen.
EG: want two windows open and visible? Drag one to the left side, snaps, drag the other to the right side, snaps, and now both are equal size and visible. All corners can be used this way, as well as top and bottom. Makes for extremely easier windows management.
Also the "minimise, restore, maximize and close" paradigm of control buttons in windows makes a lot more sense: Minimize is the same between. minize to task tray/dock. however, this is where ti differs greatly. Maximize for windows means, maximise that window to the desktop. There is NO option for this in OSx, and currently in 10.10, it's "Fullscreen", which is a fundamentally different beast and problem entirely. Restore returns your window back to it's last size from maximized. close is close. There is no way in OSx to "maximize" and application window, without "fullscreening" it, which can be an absolute chore.
The windows task bar is also significantly easier by default to use than the Dock. Mouse over any open program in your task bar, and you immediately get a visual representation of that applications running window (even if minimize), at which point you can click to restore or close the program. By default, in OSx, this is limited to a right click for list of what is running.
On the other side, OSx does the Expose thing much better for a complete overview of what is running. There is no real competition from Windows on this (closest is WIN+TAB, but that sucks). And Mission Control truly shines when used with a touchpad. Something Windows has never gotten right to this day.
For me it comes down to how i'm using it. For a touchpad, OSx seems smoother. For a mouse, I prefer windows. For touchscreen.... Windows is the only option right now.