Not dumb, just not used to the way it works. It is a bit different. You've spent a long time learning MS-Windows. To really use Linux to its fullest, some of that will have to be unlearned. :-) A lot of it translates pretty well in the Linux world these days though, depending upon what desktop you use.
Excellent point--learning Linux broke many bad habits I've had with Windows.
Plus, the transition can be (though not always) rough--especially for long-time Windows users. I've been using computers for virtually all my life and it still took me several weeks to fully adjust.