funhaver1998he was mean to arrek and yomps too before they joined the teamhis fear shows. the top spot was never his to keep forever and he knows it.
The top spot isn't hard to keep if you replace whatever teammate(s) you lose each season with the best the scene has to offer. You strengthen your own team and butcher the #2 / #3 team, ez win. TF2 doesn't have enough dedicated players to make several teams that would be on equal footing at the top
It's not just a b4nny exclusive thing either, 7 did it for ages in EU as well. I'm sure there are tons of other examples, I just don't follow the scene that closely. Player(s) on the #2/3 team get good enough to challenge the #1 team and give some hope of actual competition at the top => player(s) get poached and incorporated into the #1 team, boredom ensues next season. The #1 team has the same name, sure, but the roster changes every few seasons to a frankenstein mishmash of whoever the 6 best players at the time are, ship of Theseus kinda deal.