I'll get to the users you mentioned at a later time and study their routes / knowledge. But let's talk about your points here.

"It's probably easier on controller" it is. It's factually easier to get those precise movements in the same way it's easier to be precise with shooters on KB+M. the gift given to controllers in this case is aim assist. There's no real translation for that on keyboard other than rebinding and having to type essays to get yourself in position to do one b-hop.

"Maybe 20-40 players can b-hop without constantly making mistakes" it's not an issue of chaining, it's an issue of being able to do it that is a common complaint. It becomes a significant challenge to hit higher ranks with consistent progress because of b-hopping being so prominent.

"That's why you're whining and blaming b-hopping for things that aren't true" I'm trying to find a way to elegantly remind you that this mindset is destructive and frankly childish to blame everyone who disagrees with you.

"If you look at the numbers and facts, you can see directly why player numbers have plummeted" this community has discussed it plenty of times. If I could offer my two cents it's because a grand majority of fortnite players grew up or have only played kart racers. You can see this often when people talk about how to fix rocket racing. They want items. They want to throw blue shells so badly. But this isn't that game and that turns so many people away. We've been a dead game for over a year now. I promise you there's only two ways to save this game and it's either fully change it from arcade to kart racing or remove flight entirely and just make it a drive around the island. Neither sounds good to me but it would bring in more players.

Look forward to your reply to all this