KDE is configurable for a reason
Linux is configurable (how many distros?)
KDE is just that as well. I have used it for many years. I have tried the others, I like KDE. I expect it to be heavy so I just build a more powerful computer to compensate.
Why would I want to do that? Because I use the computer as a major tool in my life and I like a comfortable place to work. It is a task to learn any GUI, so what. My best advice to anyone learning Linux is to pick a good distro and learn to use it. No shortage of selections. I use aptosid, with a KDE that is pumped up and many applications that demand power in core and HDD space... and speed to make it seem seamless, which it does very well.
There is no reason to pick on someone else's choice, I gave up that useless activity long ago... just pick your tools and learn them well.
KDE gives a plethora of choices so it can be fine tuned to be what you want it to be.
Choice and simplicity are not compatible goals... the greater the choices and configurable elements means complexity is inherent in the design... I just like a pretty desktop and with KDE that is certainly possible. If I also want speed and performance I need to up the capabilities of the entire system. So I do...
michael@Eyland0:~$ infobash -v3
Host/Kernel/OS "Eyland0" running Linux 3.8-8.slh.2-aptosid-amd64 x86_64 [ aptosid 2012-01 "Θάνατος - kde-lite - ( 201212010120 ) ]
CPU Info 8x AMD FX-8120 Eight-Core 2048 KB cache flags( sse3 ht nx lm svm ) clocked at [ 1400.000 MHz ]
Videocard NVIDIA G86 [GeForce 8500 GT] X.Org 1.12.4 [ firstname.lastname@example.org ]
Network cards D-Link System Inc DGE-560T PCI Express Gigabit
Processes 178 | Uptime 11:39 | Memory 925.8/7973.9MB | HDD WDC WD6000HLHX-0,ST3500418AS,AS2105 Size 1420GB (35%used) | GLX Renderer Gallium 0.4 on NV86 | GLX Version Yes | Client Shell | Infobash v3.46
Fast and seamless power in computing.
Its not a problem with me that someone else has a different goal... Its all Linux after all is said and done... that’s the power... it all works.
One other small point, 89% of kernel development comes from corporate sponsored development now... Linux is no longer a hobby, it is running the world beyond the desktop even as we talk about it as if it was some new thing coming up... Open your Eyes. Its doing the heavy lifting now. It may never be the future of the desktop as that space will belong to Android Mobile Linux in just a few years... That is your simple Linux, all configuration done for you.... Workstations Linux, Appliances Android.
Its all Linux.