(why are the raws considered shitty)
You can sum up all the problems (ink issues, artifacts, looking too dark or sometimes not dark enough, etc) with "the pages are printed on low-quality paper". Even assuming the tankoubon raws did not LOOK better (they do, just compare latest chapters with chapters from volumes 1 and 2) it's often that the bound volume will have production error fixes, typo fixes, additional or removed content (not counting omake), and maybe dialog changes or chapter order changes (Mitsuboshi Colors, for example, has a tankoubon release that adds at least one new chapter/moves the original first chapter to the chapter 3 position).
The bound volume is almost always the superior format for a multitude of reasons, the only reason you might consider it inferior is if you are impatient and don't understand why someone would want to wait (if you want to do magazine scans and tank scans, that means you have to work on all the chapters twice, which is a pain).
last edited at Sep 19, 2016 7:24AM