I may be confused but the giant flower defeat scene is must pay?
Not the right way, you have to deal with the fairy, hidden path around there and give something sweet to get past it. It's alright to check others places out though. Nothing said about following the storyline.
U need to give cheese to a fairy queen only then she will tell u a secret how to defeat them
The extended bad end is Patreon only, yes. But as mentioned, you’re meant to bypass the plant through other means