Well more for us I guess, but I assure you, we are not all here due to it being "all in the head"
I haven't followed any of your previous posts so I apologize in advance if you've already discussed this, but how long have have you been consuming kava? There is of course the unique reverse tolerance effect to take into consideration. I know people who have needed to take less-than-worthy 5 dollar kava supplements for a few weeks, just to get the kava in their system. In some cases I've personally observed this effct to last up to three weeks until initial effects were actually felt from the kava. Of course, she was using kona kava so, we migth have our answer on that one. Either way, this is something to consider.
Another issue could be your dose, being new to kava some people require more of it to reach an effect. I agree this can be very expensive in the beginning. I went though many half pounds from N@H when I was first getting into kava, and believe me I felt like giving up. I didn't see what all the fuss was about. Eventually, though, I broke through and found out. You just need to remember that kava is not very heavy at first, even in general it is something that kava consumers have simply learned to "listen to" and understand.
I admire the effort you put into this either way, and hey, kava might not be for you and I can understand your frustration. However kava most definitely does not suck, and those who respect it enough to give it their all usually end up with nothing but extremely positive results. If you give up now, I guess that's on you but that doesn't mean kava is a waste in any way, shape, or form.