I don't think they see it that way. They see a rebuild that was largely on schedule until injuries decimated the bullpen and slowed the offense. Had Klentak signed a pitcher and a 3B or guessed right on his reliever they are still fine. Had the epic bullpen injuries and Cutch injury not happened, they are probably trading Moniak and Medina for finishing pieces to win the NL East. And the fact that they are so far behind the Braves (and Dodgers) is still on the old regime.
If we should know anything as Phillies phans, it's almost never the manager and it's not even the GM - it's the owner (or, under the current front office structure, the president and the owner). Has Klentak executed the plan he and MacPhail and Middleton outlined four years ago? If they all were on the same page then they are all responsible for its failure. But, just as importantly, how far did they diverge from that plan, especially this year (but last year too). And at whose ultimate authority?
But also, joking aside, any discussion of the manager and coaching staff absolutely should circle back onto the front office, analytics and implementation.
And there's a small wave of depth and talent coming. It's only now that Klentak's first draft class has arrived. But the Realmuto and Segura trades gave away what little was left of the inherited prospects (not counting Kingery). I think Klentak would probably argue that he was 100% right to not do much last deadline and that he might have personally preferred to be more conservative this year (sign Machado, give Alfaro and Williams and Crawford and the pitchers one more year, though evidence suggests he certainly wasn't into any of those players). Harper created visions of 90 wins and the NL East title and then they actually went out and played like they could win it for two months. Until five or six over-30 players broke and not one of the three young starters improved.