That's not a fair or sensible take in my opinion. I think it's pretty easy to say that Leknessund, while riding for Uno-X and as an U23 rider, had made all of the nationals ITT as well as the Euro ITT and the Worlds ITT big goals for himself, to which Uno-X and him worked very intensely for months. You can see that if you watch their Youtube series from last year.I think DSM is completely shitting the bed with their youngsters. Leknessund was 13th in the WCC ITT last year. He has actually regressed since signing for DSM. I'm sure Foss made some progression, but now Leknessund is over a minute down on Waerenskjold as well.
By the way, Foss really isn't "a big boy". He has very lean legs and i think it's just his face giving the impression he's "fat".
Whereas this year, riding in the WT, for DSM, he very likely has a completely different build-up and not so intense a TT focus as last year. Furthermore he is just coming out of a demanding TdS, where he was leading the young rider classification until the last day when he decided to take risks and ride offensively.
Foss is coming out of the Giro where he had amazing TTs and has the super compensation in his legs, while Waerenskjold made this one of his goals, where again, Uno-X worked for with him for some time. And he is strong as an Ox that guy.
And with Leknessund it was always the plan for him to ride a diverse calendar this year and not go down the GC rode full throttle. So him not climbing super strong is to be expected while they/he are still figuring him out as a rider.
I think there can be a fair bit of criticism for DSM for their approach and how they handle riders etc. but just because not every talent is performing in some competitions as we like them to or expect them to, doesn't mean they handle them wrong. Or at least we just can't know that. There is a lot of variables and circumstances unknown to us.
I think you are also referring to Van Wilder with your dissapointment, but I can't really see that either. He is doing amazing TT's and is a yet inconsistent climber at the top level who was also hampered by a crash big time in Dauphine. Nothing unsual there as far as I can see it with his perfromances. Also he had the chance to be GC leader in about every race he rode this year, which is pretty great and include three of the biggest One week stage races of the year.