No it really didn't happen to left wing people all the time.
What happened to left wing people is they did bad on youtube and by left wing I don't mean liberal.
Failing to make money doesn't mean they were being hit just they weren't meeting the standards and numbers required to be eligible for any real money. I mean I think Kevin Logan has had a youtube channel longer than I have and put out far more stuff but dude barely gets any interest or traction and only gets known when he's been the side kick in some bizarre plot to take down "The evil Anti-SJW Manophere"
The only time they've had any kind of success was with big companies backing them like MTV or the Vox media empire etc etc.
Most of the early incarnations of breadtube failed spectacularly ether falling into infighting or doing something so egregious they ended up getting blasted by everyone else because turns out people don't take kindly to attempts to dox a person and trying to have them arrested for crimes that carry death sentences....... yes that happened before, but here's one of the collapses that happened
Wow, is there a new goal post event at the Olympics? I'm sure you're going to win the gold, man. That was incredible
Advertisers did NOT want to support anything left wing on YouTube for a very long time. Didn't matter if it was racial, class, homosexuality, transgender, Israel, Afghanistan/Iraq, China, South America (all of it), globalism, complaints about Obama/Clintons, drones, miltary expenditure, social security or health care. It was all deemed anathema. It's 'quality' was not relevant. It was deemed hereitcal so needed to be excised as quickly as possible
Then Patreon started, and lefties could get around YouTube advertisers demands and speak straight to the people. Even now, most advertisers still won't touch anything left. Even though many people are successful on Patreon etc. So, no. Lefties will never be as successful as right wingers, money wise. It's baked in for them not to be. But, if you've spent anytime on the left, you know this is standard procedure. You get an automatic attempts at being deplatformed just for existing.
Just note, lefties don't whinge about like a right winger does, and considering it happens so sporadically in comparison, I find their complaints genuinely amusing