Why would you want to go back in time and decide not to watch it? Just to save the 2 plus hours?
It’s not about 3 hours lost and you know it 😉 (if you include waiting to get in and then sitting through the adverts as well then it’s at least 3 hours).
I just don’t understand the point. You’ve already seen it and know you hate it so what good would it do to go back in time to just essentially not see it a second time? Or would you go back in time and not know you hated it? In which case you wouldn’t make the decision to not see it, so…?