For the main critique of Lavi, which seems to be that he does not play the kids or develop talent, that's not his main skill. This roster, as presently constructed, and as it has been since probably 2018-2019, if not earlier, is to try and squeeze as much out of the core talent of Ovechkin, Carlson and Backstrom. There are others, like Oshie, Wilson and Kuznetsov, who are also being paid to be a part of that core, but they aren't the focus of the roster.
That's been the SINGULAR purpose of this roster. It likely will still be so going forward, unless they do something drastic (which they likely won't).
The issue has been, if you don't have Carlson, and Backstrom is 2C/3C from here till he retires at best, this roster is not good enough.
Who's fault is that? There's plenty to go around, but it's the goal of the organization to try and get Ovechkin another ring. Not to get one 5 or 6 seasons from now when he's gone. The question is going to be this offseason, is that still the goal? Can they rebuild fast enough to still do both? Are they smart/savvy enough to rebuild on the fly? Can they find a game changing talent or three in the UFA / trade / draft that would make a difference soon enough? The farm is barren. There's some parts, but none of them are going to be game changers as it stands. The best might be a Russian kid who's a couple years off. Beyond that? Maybe a few 2-3rd liners, and some depth defensemen. That's really it.