To find out if this argument of "managerial-merry-go-round" holds any water, I looked at the number of full time managers* some of the most established clubs in the world have had in the 21st century. Do we really change managers on a whim, especially in a way that other clubs do not? Let's see.
* All those teams had their fair share of interims as well by the way, so excluding them doesn't alter the picture.
Madrid:15
Barcelona:14
Milan:12
Inter:18
Dortmund:13
Bayern:13
PSV:11
Feyenoord:14
Tottenham:12
Liverpool:6
United:7
Chelsea:17
Woolwich:3
I'm not claiming 100 percent accuracy in those numbers, but the picture is clear regardless. Barring few exceptions that skew the numbers such as Guardiola, Wenger, SAF, Klopp and Arteta, teams change managers every 2 or 3 years. We do not sack managers like crazy, we're just somewhere in the middle. So I have no idea what the aforementioned argument is actually based on.
* All those teams had their fair share of interims as well by the way, so excluding them doesn't alter the picture.
Madrid:15
Barcelona:14
Milan:12
Inter:18
Dortmund:13
Bayern:13
PSV:11
Feyenoord:14
Tottenham:12
Liverpool:6
United:7
Chelsea:17
Woolwich:3
I'm not claiming 100 percent accuracy in those numbers, but the picture is clear regardless. Barring few exceptions that skew the numbers such as Guardiola, Wenger, SAF, Klopp and Arteta, teams change managers every 2 or 3 years. We do not sack managers like crazy, we're just somewhere in the middle. So I have no idea what the aforementioned argument is actually based on.