Lindy has to neutralize 4+ years of bad coaching and teaching while implementing his system. That is no small ask.
Kouzens, Power, Quinn, Joki, Muel, Thompson and to some degree JJP all have the same problem: poor puck management, slow or over-thinking in game, inability to cover assignments, prolonged shifts. That's the core of the team and it can't survive as constituted.
The level of frustration over the lack of success will always overshadow the small gains they make and it becomes an endless cycle.
These players needed competent vets to play along with them, to cover for their slack in the game while they learn. Instead, they were not only thrown together to "figure it out" themselves, the coaching staff trying to help them "figure it out" were unequivocally not qualified to be in that role.