And I played for around half an hour, got this run, and unlocked damn near everything.
...
So, uh... long story short: skill issue.
You seem to be in it to win it, you consider the game completed once you've unlocked everything. Call me crazy, but I think the average person playing this is in it to jerk off. You're treating this as an actual game experience and getting pissy and shitty about it as such, which is very strange because there are much better things to play if you actually want a real video game.
If you're not playing this simply to complete it, and there is no gallery to unlock for instant replay, then every time you want to oogle the hot anime giant girls then you're going to have to do it all over again. Spending half an hour on a fairly intense level of challenge with a very high degree of punishment, every time you want to see a short little GIF of a girl making a facial expression, is perhaps an unreasonable ask? Just throwing that out there.
I know that you're very proud of your epic gamer cheevos and you want to show them off, but this isn't really the right venue for it. People are complaining for a reason.