Are you really naïve enough to believe that nothing will ever be blamed on Brexit that actually has nothing to do with Brexit at all? 'Brexit' will become commonly used as an excuse for anything that goes wrong (if it hasn't been already) regardless of whether brexit is actually the reason. It'll be the 'goto' excuse for all manner of failure.
(That doesn't mean that some things won't be caused by Brexit - of course some outcomes will be due to Brexit. But not every outcome that will be cited as 'caused by Brexit'.)
It’s funny, isn’t it?
For 40 years, the EU has been blamed for everything that is disliked in this country, even when it’s nothing to do with the EU.
Of course Brexit will be blamed for everything negative if it ever happens!