I was calling myself a loser, for spending this much time on the internet talking at length about a subset of something I like that I only kind of like, but okay
Still thriving but massively reviled franchises exist, as is demonstrated by... well, Star Wars for the last I don't know how long, the Michael Bay Transformers movies, and many others. Simply being panned by a vocal minority (or even a vocal majority) doesn't kill a franchise. A franchise, any franchise that wants to be successful, relies on mass appeal. People willing to go out and buy whatever you might be selling, both in tickets and in merchandise.
In the case of a franchise like Bionicle being rebooted, this would necessarily mean drawing in a new audience. New people who have never even heard of a Bionicle, or only in passing. People who missed it the first time, children who were too young to be exposed to it in its prime, etc. Nostalgia-filled fans with expendable income is a bonus, sure, but without that fresh audience you're bound to stagnate.
Your audience would only ever be as big as the one you once had, arguably smaller. It's been five years now. Those people have grown up, maybe gotten jobs, maybe gotten married, maybe they're not interested anymore, maybe they have other things to worry about than spend money on a toyline they used to like in the past.
As frustrating or unfair as those harsh reactions may be, they aren't the difference-maker here. The "blame", if it belongs anywhere, belongs squarely on Lego's shoulders for banking on a fractured and shrunken (if highly passionate) fanbase being able to near single-handedly return their investment while barely making much effort to reel in a new audience. Would it have possibly been financially successful if those vocal fans who refused to give it a chance had instead paid up? Maybe. But it would've been a slim chance at best.
I find it a tad ironic that you keep coming back to this point. I have seen the video before, I'd given it a like apparently so I must've resonated with the message, but I confess that I haven't seen it in a while, so I decided to give it another watch. And I think we're getting two wholly different takeaways from that video.
As far as I can gather, "You Killed Bionicle" is an entirely metaphorical phrase. This video was created at a time when Bionicle G2 was on the verge of arriving, and doubt was beginning to be sown in the fanbase, people were signing cancel Lego petitions, and it was all getting a little bit out of control. It was preempting the very common phrase "x killed my childhood" to generalise fan backlash against a reboot for being different or inferior or whatever, and turning it on its head. It's an entirely personal experience. Just like nostalgia.
Bionicle isn't (at the time, consider context ) dead, Transformers isn't dead, TMNT isn't dead and Star Wars sure as heck won't die anytime soon as much as some people might be calling for it. What the title means by "You Killed Bionicle" is: "You Have Allowed Yourself to Believe That Bionicle, and by Extension Your Childhood, Has Been Killed". If you ask me, the former seems like a more concise title
The ironic thing being, you seem to be (indirectly, to be fair, it's not exact) a target of this video. You fear the change that comes with Bionicle G2, and by extension Bionicle as a whole, being over. In denial, rage and frustration, you lash out against someone, anyone, to put blame on, for taking this beloved, nostalgic thing away from you. You refuse the idea that things can be positive, wallowing in the negative.
But it doesn't have to be this way. Yes, G2 was cancelled, coming up on four years ago now (man does time fly), but the Bionicle community was not. It's still here, living and breathing on sites like TTV, or that Bionicle subreddit, or Maskposting. Yes, we're not a big community, certainly not big enough to be financially viable most likely, but what we lack in numbers we more than make up for in raw passion and dedication. Yes, the story has ended, content has stopped flowing, but there are innumerable fan projects to rally around like the stuff being rolled out by Red Star Games, or Bionicle Dark Souls Quest for Mata Nui, or heck, even the actual Christian Faber's ever mysterious 3IONICLE. Yes, there aren't any new sets, but canonization contests are returning (approved by Greg!), MOCing is very much alive and well, and there is still every possibility that Sokoda's amazing 20th anniversary diorama will become an official Lego Ideas set that we can purchase, and build, and cherish.
Bionicle the product is gone, maybe for good, and I can't deny that it kinda sucks. A lot. But that's just the way of things. As a horribly parsed Bob Ross would say: you can't have light without dark, you need to have bad stuff happen so you can appreciate the good times. But Bionicle the product was only ever going to have a limited shelf life (pun unintended). Bionicle the idea? Theoretically, that could live forever.