We got a similar flyer. My area is a Labour safe seat, 70%+ for Labour last time, Tories barely scraping double digits and Lib Dems at 7% , yet the flyer claims Labour support is going down, and only the Lib Dems can stop them. I think the Labour bar was actually in the negative? I'll see if it's still floating around.
Found it:
Edit again: even the independent got more votes than the tory. Lib Dem got even less. Green took a lot of Labour votes to come second, probably because of Gaza.
Is it? It looked to me like he was calling out everyone apart from Count Binface. In fact, as far as Lib Dems go, the one that stood out to me the most was probably one that showed them in a fairly good light. He pointed out how, in a seat where the race is between LD and Con, the chart showed those two accurately, and overrepresented the smaller parties. And even that overrepresentation is fairly simply explained by graphic design needs. The arrow at the top of the bar is similarly obviously explained: an arrow represents directional change. They're signalling "hey, vote for us and this is where we could be!"
Even in this video the presenter details how they often used values from completely unrelated elections because it made them look better.
Worth highlighting that the more egregious manipulation from the Lib Dems would not be in a constituency where they actually stand a chance (where the video presenter is based and used as a source for his leaflets). The worst is when they're solidly in third, where they misrepresent their position and cynically try to take votes away from the actual alternative contender—you see more cases of that in the articles linked in the video description
Well fair play, I've lived in labour strongholds for the past two decades so perhaps that's why I've never seen it from labour, but anecdotally it's always predominantly lib dems in these lists (e.g. per the BBC articles linked in the posted video description).
Personal rant regarding your options: (feel free to disregard entirely as this is obviously opinionated)
For what it's worth that's a sucky situation with both the Tory dominance (by the by, where on earth are you that's still polling that highly for them?!) as well as your labour candidate, but I personally can't ever forgive the lib Dems for making the Tories king in 2010 in the first place and enabling this decade and a half of shit we have all been enduring. Without them Cameron's minority Tory government collapses within a year or two.
But hey, at least they delivered on their campaign promises that were their red lines for going into the coalition!
Freeze university fees? Nah how about triple them. Alternative voting system? Nah let's let the Tories scare the general public off the idea for the foreseeable future—oh and give the vote leave con artists (No to AV had the very same people behind it) their practice referendum so they know exactly what to do with the Brexit one, which would likely never have happened if the lib dems didn't form the coalition.
They not only failed to deliver on every promise they campaigned on, they reneged on each in the absolute worst possible way.
I voted for lib dems in 2010 and I've never regretted a vote more, and will never make the mistake of supporting them in any way again. I and millions of others will not ever forget all this, so now the only thing they're demonstrably good for is attracting disillusioned Tory voters away from voting their usual way.