Agreed. There are many criticisms to be levelled at Labour in their current guise. But blaming the opposition for the outcome of 12 years of Tory rule is beyond a joke.
It works though. Every day you hear someone on TV (usually with a voice that sounds like their mouth is full of pasties) saying that "Labour got shit everywhere". And it goes unchallenged, quite often whilst a Labour MP is sat there, floating slightly in their chair.
Then you find out where the oft used phrase "Labour got shit everywhere" came from and it brings you back to an event when someone got shit everywhere. After some digging online you stumble across a BBC article where it states that Labour were once accused of shitting their pants and letting the contents spill out.
So you do some more digging and eventually find an older Guardian article where a Tory MP has been cautioned for lying about an incident where he shit his own pants and poured the contents on the floor, then falsely claimed it was Labour's fault. And for a few weeks every Tory mouthpiece parroted the line much to the complaints of Labour members who asked very politely if the Tories would stop. But by this point only the Guardian was headlining the story as everyone else was focused on the latest scandal about a celebrity fecking a goat beside a giant tidal wave.
You do one final quick check and discover the original BBC article about the situation called "Unknown smell in Parliament. Unnamed source says Corbyn possibly to blame" and every headline on every news site carried the same story, knocking into second place the story about the moon being blown up by pirates.