While I agree this is definitely a big issue
Is it though? Your sampling is limited to friends who you say are no longer "this way". If your sample is sufficient evidence that it was a problem, then it's sufficient evidence that it's no longer a problem.
In reality, polls have shown progressives to be the most reliable voters in the country. Beyond that, they are the most involved in volunteering their time for Democratic campaigns.
There is nothing wrong with getting the message out that voting for Democrats is critical to everything the left might hope to achieve. However, framing the debate in a way that blames the left for the failings of liberal centrists is far more likely to push some people in the wrong direction. It's not just unfair and unproductive, it's anti-productive.
There is a reason that when the Democratic establishment doesn't push this message that right wing trolls like OP do it for them.
And you figure that memes like this might change their minds? Assuming this is actually the biggest problem facing Democrats in this election, shaming voters is not the right strategy.