There are a couple of things going on here, and one of the biggest problems is hitting acquisition and development. To go to the other side briefly, I think they have largely done fine on the pitching side of the scale both international and domestically. Francisco Morales isn't going to be a big time guy, but he might be a solid outcome. Starlyn Castillo does not look great right now, but we are also in post TJ rehab, and part of the risk of pitchers is they get hurt and injuries happen.
But to the hitting side. We can chicken and egg this about whether it is garbage in or the development has been poor, but I think the correct answer is that both are at fault. Guys like Ortiz or Yemal Flores are big swings on big tools. Yhoswar is just sort of weird and the pandemic and then some injuries have really messed things up to make it worse than it should be (he still is really talented and maybe it all clicks, but I don't think anyone is counting on that). But I don't think the Phillies have been great at finding good actual hit tools (except weirdly in the Pacific Rim now after Mead, Lee, and Pouaka-Grego) and they have been bad at pulling them out of guys. So to take the draft side, Casey Martin was DOA, he can't hit, he will never hit, and there probably is nothing a coaching staff could do about it. I don't really have all of the nitty gritty to get into why it all didn't work and I know that part of it is power struggles at various levels of the dev ladder. So hitting dev has been bad.
As for the complex overhauls, those kicked off just over a year ago and kicked into full force this season. I don't expect them to suddenly powerhouse, but from looks and data the floor has been raised. I think Bergolla looked really good this year, they have some other guys who are interesting, and I think we will see some of them stateside. There isn't a guy where right now you are pointing to as a star, but the overall floor is much higher and on some level that is what you can actually control when we are talking about people who are functionally children.
To the circle back around to pitching, they are getting good at dev and scouting. They aren't a top tier org yet, but they stole heavily from the Yankees, Tampa, Houston, etc to build a program. There are some arms in both the domestic and international complexes that show interest. They are doing a good job on the low end guys, but also you can point to the high end guys like Abel and Painter and see there is Phillies driven dev there.