Don't normally intervene in stuff but as someone who's had on and off communications with the dev, I wanna clear up some things.
First of, the original plan for the games combat was to be more puzzle based than RNG based, its made to have every boss be possible without fighting a single regular enemy so long as you find the right "Puzzle Piece" to actually pass the fight. The post game boss is meant to be a check for the casino item, but you can actually beat it using the TP regen mints instead of using the medal, it just needs better timing and (Very slight rng)
The bad end game mode has been made massively easier in this version of the game, a skip was added so you can only view the scenes if you want and as far as im aware the dev also added the ability to save whenever you want (Two things I passed on from the community)
The base game itself is unlikely to get any updates from not on, apart from the official English translation which is in the works, and a small bonus minigame.
Hope this somewhat clears up the normally "Bullshit" difficulty.
I have actually beat the whole game with zero kills on enemies that aren't required as part of playtesting before. It took a few attempts but its more than possible, and most bosses have secrets to make it easier.
(Also, As a little side note, if this uses the patch @123asdasdasd34 made then I translated the stamps into English, that is also the cause of the sprite error in chapter 3 if that is still relevant, unsure if this patch cuts it out or not)