There was nothing stable about Arsenal's football operations when Arteta joined. Arteta along with Edu revamped everything. There is no 'amazing' structure above Arteta. Our reversal of fortunes and upward trajectory are simply a result of Arteta's changing the dressing room culture, and recruitment. Ozil - gone. Aubamayang - gone. Ghendouzi - gone. Basically anyone with even a hint of an attitude was binned and we signed players who were willing to buy into Arteta's methods fully - White, Odegaard, Tomiyasu, Jesus, Zinchenko, Rice, Timber, Trossard. Basically every signing since 21-22 has fallen into line with no hint of an attitude.
ETH cannot sit as a passive party and 'wait' for Sir Jim to put something in place for things to come together. He has to be involved, and if he isnt, then thats a problem. I always wondered if the signing of Casemiro was driven by ETH, or did ETH go along because Casemiro was available and attainable at the time? Arteta would never have dropped so much money on a player because of convenience. Arteta would ask questions like, will this 70m come out of the next budget, how hard will it be to shift Casemiro if he starts to waver in performance, which is a real possibility for a player over 30 on a 4 year contract. Perhaps will wait for the next window. Which is what we did when we pulled out of trying to sign Caicedo because the numbers wernt making sense, this allowed us to get Rice in the summer.
I also wouldnt say comparing Arteta to Ten Hag is a slight on Ten Hag. You do realise Arteta just finished 29 points ahead of Ten Hag? With a goal difference of 62 compared to -1?