Oh, you're smart, you are. Posting a 'GP2X sucks' rant in a forum full of GPH fanboys. You're a brave man.
But seriously, who cares about the build quality, when you've got your endless supply of free games? As long as it works OK, and doesn't fall apart, the build quality matter pales in comparison to the enthusiasm and great developers behind it.
If you're annoyed about the stick, buy a DaveC cap. If you're annoyed about the screen, your argument is justified, as the screen is sharp and clear in hardware, and surpasses the PSP screen (not talking about size here) completely, but the software used to control it is destroying it completely. The CPU/LCD Tweaker might solve some of your problems with the screen, but it won't solve all of them, so you'll have to wait for new firmwares.