I agree with most of that though MacPhail's biggest problem was that he was an absentee POBO who let Klentak run the whole baseball show (and not particularly well) or MacPhail was just weak and let Middleton be too meddlesome and, in turn, run over Klentak too much. Dombrowski has the gravitas and stature to keep Middleton in his place and perhaps has made Middleton a better owner in the process. MacPhail, by his own admission, was basically an old man who had to be recruited out of retirement.
You are right that there was no rush of people to take MacPhail's or Klentak's places because of all the talk of how toxic the Phillies organization had become with so little direction and so many competing factions and views, even on up to the revolving door of head pitching and head hitting coaches at the ML level (we literally had a different one of each every year from 2017 to 2020 before finally settling down on Cotham in 2021 and Long in 2022). That had to be laid at the feet of the MacPhail-Klentak leadership.
I don't think Klentak was an abject failure. Many of his big ticket moves were hits--signing Harper (extending the length of the deal to lessen the AAV has become a model that other teams have followed), the Realmuto trade (in the end, we robbed the Marlins), signing Wheeler (possibly his best, most visionary signing), trading for Segura got him out a jam he created with the Santana signing and even signing McCutchen and Arrieta were not total zeroes. And, trading Mead for Sanchez...brilliant. Ironically, where Klentak fell down--in addition to not adequately rebuilding the farm system--was on the margins, the bench and the bullpen which were always bad from 2018-20 when the Phillies supposedly were contenders, which is ironic considering how much he and Kapler talked about finding "value at the margins".
