lol ... you want a 30" monitor without issues. and yet even 24" monitors have issues. because the quality control is horrible and the manufacturers save on it because they found it has almost no impact on their sales; bad monitor keeps getting returned? keep selling it, someone will keep it.
add the new ultrawide, freesync, gsync, high refresh, ulmb, etc technologies that make them even more desirable, and you should be able to figure out why Asus & co don't give a toss about QC.
i also want a new monitor. i also find it shocking the number of people who (with attached images of proof) report horrible bleedthrough, 10+ stuck pixels on new screens, chassis parts falling off.
the answer is don't buy one.
wait.
wait until the novelty has died off, and homogeneous market forces them to produce high quality units in order to compete. (like it happened a few years ago on 1920 x 1080 screens)
give it a year and quality will be back to acceptable standards.