The two main criticisms of self-improvement:

It does not work. Period.
and
You are taking advantage of the less fortunate because of this.

Here are the sites that don’t hold back in criticizing self-improvement:

THE SALTY DROID – >> BLEEP

or

REDDIT: THE FRONT PAGE OF THE INTERNET

particularly these two AMA’s here>

HTTP://WWW.REDDIT.COM/R/IAMA/COMMENTS/1F1N1Z/IAMA_THERAPIST_TURN_THE_TABLES_AND_ASK_AWAY/

and here>

http://www.reddit.com/r/IAmA/comments/ycoln/as_requested_iama_personalprofessional

I included these sources because of the extreme heavy criticism that though often mean and profane still gets to the heart of the problems found in psychology and self-improvement. This helps to set a context in which the criticism or attempt to invalidate Gutap will then have a place. It is also because of this outright hatred that a cure hasn’t been found before. It took me some years to get through the bickering over methodology that is required in the field of psychology (what is your chosen methodology? YOU MUST CHOOSE ONE!) to be able to find what works, why it works, and how it can be consistently reproduced.

Happy hunting!