Reading your posts make me laugh so much how much entitled you are, kid. You're talking as if ILLUSION developer is based on Western regions, making a lot of money. If they did, you'd be right that their game was terribly made. But they're not.
In Japan, I doubt they make a lot of money to be compared with big publishers/ developers like SquareEnix/ Capcom/ Konami/ Sony. From their financial standpoint, they only make enough to sustain themselves. Look at TEATIME, another version of ILLUSION, was closed down despite being founded at the same time as them. You have to be grateful that they're still staying in business, and expanding into the Western market (FAKKU/ STEAM) slowly.
Of course, it's not rare to have Eroge games published in ENGLISH, but it costs a lot of money to hire these Westerner translators/ medium, and chances are some m*therf*cker in the WEST decides to make changes of the ORIGINAL version to fit in their nonsensical propaganda shit (look at the WESTERN outrage on female sexualization in entertainment media, the shitstorm FUNANIMATION doing to the ANIME, SquareEnix's Ethic Department doing to TIFA's revision of her chest, etc.).
Lots of these shits can deal a financial blow to their revenue. So yeah, you should be extremely grateful they decide to publish their games gradually for Western audiences since it's not required for them to do so.
Enjoy the game as it is. Is it terribly made? -Yes, but there is a financial reason behind it. And the mod community is voluntary, and if you think you can make the game better, do so. Complain jack-shit about the game on the pirate forum, yeah, entitled that much, kid?