Maybe that particular show DookieLukie went wasn't their best, but how can you generalise that the whole tour was bad if people keep on saying it wasn't? Of course you will probably argue that people are deceiving themselves because they don't want their favourite band to break up, but that hardly is a valid argument and if you so openly quest the rationality of all the counter-arguments, whose count is gigantic, a question that rises is that maybe your argument is irrational since it is alone against the evidence that suggest the opposite and is much more greater in count and generally provided by people who are known not to have the Christ complex.
It is possible that they had a bad day when you saw them, which is perfectly normal, but one bad show doesn't per se mean that the whole tour was a disaster and most certainly one bad show isn't a reliable sign of a break up.
And even the show being bad is a personal experience and opinion, so there's that too.