The socialists haven't been communicating with the working class for decades. Just sitting around complaining about liberals not listening to them.
The socialist sentimentality around the imagery of red flags, hammers and sickles, photos of Marx and Che Guevara means the working class is going to ignore everything you say. These are imagery associated with the failures of socialism. No matter how many excuses you make about how it wasn't socialism's fault the previous iterations failed, you're the ones putting yourselves in that position by insisting on associating yourselves with those failures.
Liberals are the left side of where the will of the people is at. Because it's a democracy and not being anywhere near where the consensus of the people are at isn't going to win an election. You're just sitting to the left of where liberals are at laying down judgement as if that's going to influence the people of a country which is the only thing that's relevant.
Liberals will always be the left side of the will of the people. If you influence the people to move further left, liberals will move further left. But communicating with the working class isn't what socialism is about in the 21st century. 21st century socialism is all focused on waving red flags to get attention and complaining about how politicians that follow the will of the people aren't following your will instead.
Fake ass socialists just whining on the internet instead of talking to the working class.