Every manager we hire is playing a rigged game, part of that is our fault (Sugar era and start of PL era with us not in a position to take advantage of new money cost us over a decade of progress), part of that is FA/UK allowing fudging money doping clubs (City/Chelsea), and they all have had to do more with less.
Poch is a culmination of the club addressing a lot of that handicap over 15+ years prior, we have now been in Europe for 12 or so consecutive years (end here most likely), Harry got 4th twice in three years, AVB as someone mentioned put up a points total that in almost every other year would have been 4th or better, Poch made that consistent, and to his credit made it enjoyable (Harry was almost as divisive as Jose, and a lot of people didn't take to AVB). So as I said, lots of credit to Poch and I would have the view a lot of people have of him if he had walked away post CL (when he knew he was broken, team was broken, reset was needed), but I will never have the view that somehow we were a bottom half team or something with brick players that he magically transformed, and there is no way out of saying a team with Lloris, Jan & Toby, Walker, Rose, Dembele, Eriksen, Kane, Son, Dele (all in the best season/prime of their careers) won nothing ..
We have been setback but not done, once the stadium revenue kicks back in, some normality returns, we will be well positioned to challenge top 4 again regardless of manager/personnel changes