Well, in 2022 I think they just ran out of gas and into a clearly superior (106-win) opponent. Less so this time. But I also think it's just random/luck more than anything. All teams go through streaks (both good and bad) and get bad starts and unfortunate relief outings. Only one team avoids them in the very last series. The Dbacks were also exposed in the same way (partly couldn't keep beating superior-on-paper teams indefinitely, partly their luck ran out).
You can't really have it both ways, can ya? Winning 100-plus games has gotten a lot of teams nothing, but if you're "built for the post-season" where anything could happen, that includes the bad stuff too. Had Turner and Casty and Harper not been so incandescent to begin with we wouldn't even be talking about the fact that the switch got turned off.
It's also easy to say now that the Phillies might have gotten to the World Series if the line-up had just been a little deeper as well as more selective, and the bullpen a little better but that doesn't mean whatever Dombrowski does to upgrade the OF or replace Kimbrel will actually lead to that. If we are once again lamenting next year's team coming up small in a seven-game series it will have been a more successful post-season than we should probably reasonably expect (i.e they could easily drop back to the 2nd or 3rd wild card and lose in the first round, or finally fail to beat the Braves or the other top seed in the second round.