It sucks that you got hit by the YouTube algorithm, but I'll confess that even I wondered why you posted a video showing the distorted face of the "curb stomp" victim -- that seemed beyond the pale. But it seems to be an ever-present truth that YT is quick to kick 2A-friendly content to the curb.
The real question is what do we do about this. The inexperienced often suggest "just move to {UnderdevelopedPlatform}", with a demonstrable failure to understand how and why YT works -- and wny nobody else holds a candle to it. A few thousand of us dropping out of YouTube is going make *squat* difference, and content providers worth a hoot cannot make up the lost YT income elsewhere.
These numbers aren't insignificant; and the oft-repeated thought that "if we just all moved it would work" is founded principally on a lack of understanding.
Even if we could get every single one of us (and there is no credible chance of that) to stop using YouTube, it would not move the needle.
We can't sue, because they are not breaking any laws, and it's private property we should be honoring that anyway.
The simple truth is they are the 800 lbs. gorilla in this space and nobody can build a legitimate challenger.
You were big enough and business-savvy enough to launch the App -- which ain't cheap and cannot be found by folks just wandering around looking for interesting content: They have to know to come here. Most channels will not have this privilege, and it doesn't replace your lost income, merely your lost access.
What's left? How do we fight this kind of injustice?
I hate to say it, but this feeling of helplessness against the machine smacks of what people of color have described being Black in the South was like in 1960. Your only option is to put up with it, and hope your movement outlives theirs.
What a mess.