Arteta hasnt won anything of real note yet bar an FA Cup a few seasons ago and you mention if he were doing this job elsewhere, but he has been at Arsenal a long time and spent a hell of a lot of money.
He is a good manager and he has an excellent side. But he has to win this season. This is not a case of a new, plucky manager, this is a guy who has been there a while and spent lots of money.
Either way the point stands
Arsenal have their 5 best players 25 or under, with a young manager, getting better yr on yr, going deep in the CL, money and a board willing to gamble to the limit of ffp, whether Arteta is technically elite of not, doesn't matter, he will likely finish his reign at Arsenal with more titles than klopp, Arsenal are riding high and the news about Alonso makes their horizons look even brighter.
We have l lot of work to do, even if our next manager is better than arteta, he may well achieve less in the next 2- 4 yrs.
I doubt we can find out own arteta, as it's easier walking into a dressing room that has won little(like arsenal's in 2019), in your first job, I think it would be difficult for a arteta equivalent (or even de zerbi) to walk into our dressing room considering what our team has won collectively and command continued loyalty if things don't start well