The main issue with some of the way NATO has approached Ukrainian training, is that they are trying to re-create a new army, instead of simply improving on what's already there. They look down on older practices (ironically, one could argue that it was Soviet legacy equipment and mobilization infrastructure that saved Ukraine in its first three weeks) and try to reject everything in favor of "modernity" or Western style practices.
In my opinion, this is an error, and this approach has led to what Kofman described as two armies co-existing in one organization, which is clearly a source of friction and mis-communication in the army.
Instead, NATO trainers need to focus on cohesion, and improving on parts that are deficient, while maintaining or evolving the parts that work well. NATO's commentary and approach, is ironically reminiscent of the typical caricature of a Communist Commissar. Detached, and un-involved in the actual work, while passing down judgement on the people who actually do the work.