Thank you so much!
Most of the problems you say are fixed and will be presented in Chapter 1.
The fishing got better performance, it should work way better now. The Plague Fish is a bug, or, I should say, my bad. Because the "ticks" required to catch it are more than the ones available to get, with the most possible speed and all items. So yeah.
The prologue was made in the spend of 1 year. The first Shino events were created when I wanted the game to be a "haha sex game" that's why it's ultra rushed and kinky. In chapter 1 I tried to be more natural. Of course, the MC will say different lines and act differently based on the girl to vary kinks a little bit, but I didn't like the Shino events and will probably be changed.
And it's called prologue because it's an introduction to the main cast and a "settlement" of the MC in the guild. From the end of the prologue, you know that the home of the MC is the guild and Sealed Town, and, he already gets to know most characters and interacted with them. The Prologue had no antagonist to stop the MC's foot from being the Hero of the guild or something, there were only internal problems, but no more than that.
Chapter 1 has way more content than the prologue, and there will be problems, of course!