Well, first of all, Violet's date is not in the free version of the game yet, it was only added in version 0.5.0 and it doesn't get overridden by other events. You have been warned that Violet's date is not in the game yet, when the date gets assigned.
About the saves. The game autosaves every Monday, so even if you forgot to save manually, with 8 autosave slots, you should have almost two months worth of save points.
Lastly, even though the first Trial can be won with you stats just above 30 if you know the Trial inside and out, and anything above that just makes the Trial easier, you don't really need to win to progress the game, as you clearly figured out yourself.
If after all of that, this still isn't your kind of game, well, I am not doing a "game for everyone." Hopefully, there are a lot more games for you to scratch your itch =)