All the effort I put in... ㅠㅠ

Ahhh, seriously!!! Give me back my time and effort~!! I worked so, so hard to clear the boss battle... why did they make the selection screen like that.... Aaaaaaaargh!!!! After the battle, that screen popped up with 'Change Account' and 'Delete Cache' on the side, so I thought I'd go back to the title screen to save... I waited and waited, and no matter how much I tapped the screen, nothing happened, so I thought the game froze and restarted it... It happened again the second time, so I waited again and then restarted... After clearing it the third time, it happened again, so I looked up a guide... and you're supposed to do it like that?!!!! I had a bad memory of deleting the cache once before and then having to reinstall because it wouldn't run... Who in their right mind would press 'Delete Cache' on that screen?!!! Give me back my time and all the effort I put in.... The battle was really, really tough.... Why did they make the choices like that... It's just too much.... ㅠㅠ