Exactly. You seem to be doing a few things that will only deter your efforts. First of all your mental attitude always seems to be negative. Did you study any of the threads I asked you to in the Mental Penis Enlargement forum? This is the first place anyone should read before they do any physical work. Being unsure, cutting yourself up, taking a negative view will keep anyone from making even a tiny gain.
Secondly, advanced exercises will not give you gains just because they are advanced. Advanced exercise is for those who put in the newbie time. The reason my members site has 5 phases is for this exact reason. Gains are progressive and the progressiveness is built on the basics. I have a very bad opinion of clamping in general. It seems to be very dangerous due to the restriction of blood flow. I have never needed to do something that drastic to make the gains I have made. Perhaps I am being too cautious but my penis means more to me than taking a risk of fucking it up.