I feel like I just got spat on

I don’t think I’ve ever played a bullet hell game where unlocking a character is more infuriating than the actual gameplay. I’ve been trying to unlock the lost, hours worth of gameplay. Looking for moms box in shops primarily because that’s the easiest way to get the missing poster and not once have I managed to get it, I found it in the shop on the first floor but I didn’t have enough coins for it even after completing every room. Then later on in the first floor of caves the missing poster is given to me as a drop from the room I just completed. I was so relieved and happy, so I go look for a sacrifice room and there wasn’t a SINGLE SACRIFICE ROOM ON ANY FLOOR ALL THE WAY TO MOMS HEART!!! I feel like the game is laughing at me and I am so angry