As a MBP owner, I'm hard pressed to find anything more frustrating to use than the OSX Finder.
A lot of people complain about the Finder because other people do so.
I've used Unices since Sun OS days. I've used Linux for 15 years (from RedHat 5 and Mandrake to Ubuntu 12.04). I've used Windows for 6 years. I've used Macs for 8 years.
What exactly is the problem with the Finder compared to what's offered on the other platforms?
Specific, measurable, gripes. Not "it feels slow" junk.