Woah, buddy. Did you just blow in from stupid town? Threshold pays artists for the art, which means they all work on relatively the same timeline. Couple that with the fact that this is a VN with combat mechanics (both features that Threshold is familiar with at this point) and that the game has been in development for over 6 years, and it's understandable that some people are annoyed with how long development is taking.
For reference, a much larger game with much more content and more art/monsters, Monster Girl Quest: Paradox-Part 2 released in 2017. The third (and likely final) part is releasing in November of this year. Keep in mind, ToroToro Resistance is just one dude working with multiple artists, too.
I'm not saying harassing or nagging Threshold is justified. I'm just saying if you're going to try and dismiss complaints others are having, it's best that you don't talk out of your ass.