Put yourself in a Boogie fan's shoes. Firstly, you are now retarded. But secondly, what would you be after? Francis videos? Gaming content? Political takes? Gameplay videos? MTG unboxings? Personal content? Trending topics? His content is a rudderless mixed bag where any of the above content isn't interesting and there's thousands of creators who do it better.
Anyone left at this point just watches because they've been a fan since they were a kid or have been subscribed for X amount of years. You would be hard-pressed to find many new Boogie fans from the 2019 onwards. What would have drawn them to his channel? He is very much not the loveable Mr.Rogers character he played before. Francis is 10 years past his use-by date. Gaming content? What gaming content? There is none. If I wanted to watch MTG content, I certainly wouldn't subscribe to a channel which uploads MTG content once out of every 25 uploads.
The only people left are morons or people similar to Boogie. He doesn't collaborate with others and is actively hurting his reputation within the community by starting fights with them. His detractor community is literally just The Farms at this point. Yes, there are a couple of channels which talk about him sometimes, but he doesn't have anywhere near the dedicated channels like Wings or DSP who actively reupload or discuss their content. Boogie is infinitely less amusing than those two and 10X more infuriating. This is obvious from the random users you see popping in on here from time to time who check in to see if he's dead yet.
Killing Sam and Tolki didn't really achieve much apart from move the userbase to here. Watch any recent 3rd party videos about him, read the comments and the overwhelming consensus is that most viewers hate Boogie and are aware of his shitty behavior. This goes for Reddit threads and any time Boogie gets retweeted and called out on Twitter. I had a large archive of examples before I accidentally deleted everything.
All that he can do moving forward is clickbait and hope to trick people into watching his content but that will grind on his dedicated fans after a while and won't attract new viewers.
I plan on making a megathread about this topic when I've got enough saved material again (tbh this post is getting lengthy as it is...) but he should've done what other creators did who had 15 minutes of fame. I think of creators like Laina:
You remember her right? The Overly Attached Girlfriend:
She went viral from making a video playing a character, then made another viral video and decided to run with it before creating content as herself, only occasionally referencing her character every now and again. As you can see from the first screenshot, she obviously gave up about 5 years ago and the uploads dropped off drastically as she lost her passion for the channel. Her reasons ranged from depression, moving on from that period of her life and having
other things to look forward to.
I highlight that last part because this is what Boogie lacks. Nothing else going on in his life. Therefore he is destined to grind out the years, months and weeks until he starts phoning in even lower tier content that barely break 10K views. His life since the late 90's has been internet, internet, internet. He brings his fucking phone into the swimming pool, like come on

Being internet famous is everything to him. He feels a sense of importance every single time he holds that phone out in front of his face and hits "record". He knows some of his drones will watch and give him an asspat or two. Losing his relevance and audience eats away at him each and every day and he has no idea how to win it all back.
Boogie will not be one of those athletes, Youtubers or TV shows that finishes on a high. His next viral video will be his final video, the last one he uploads before he dies.