We've spent more, sure, but Brentford are actually in the top half of the net spend table over the past four years, they've reinvested the fees they've gotten for their big players and then some.
Reportedly a cheap wage bill of course, it's a club recruitment strategy based on a volume chances taken on well-scouted younger players, but Frank has had decent resources to work with throughout his time there, it's not a relegation fodder squad.
And truly, you look back at the players they had in the Championship and wonder how they didn't walk that league. That's an unfair stick to beat Frank with, but it does make you wonder whether this is a real superstar coach.