You actually missed my argument:
The captains generally the preeminent leaders of the team right? Of course with leadership group around him. Ok:
Oilers, McDavid: Generational, future 1st ballot HHoF
Panthers, Barkov: preeminent 2-way player in the game w/skills to go through multiple players like his last goal. Likely future HHoF
VGK, Stone: Another Preeminent 2way foward
Lightning, Stamkos: Elite player, future HHoF
Pens, Crosby: Generational, 1st ballot HHoF
94 NYR, Messier (no shit): 3rd all time points, HHoF (no shit)
All can back up their leadership in the room with their elite abilities on the ice. Trouba just can't, especially last two years/playoff runs.
Messier the best leader all-time no doubt but ask the Canucks about his leadership as his play deteriorated and they missed the playoffs all three years he was there (and his subsequent years with the NYRs). Of course that goes beyond him but leadership doesn't mean much if your play can't back it up.
Trouba's heart is in the right place but his play has become detrimental in the prominent match ups they are putting him in and he makes too much in a salary capped league to shelter him on a 3rd pair and become a glorified cheerleader.
TL,DR: Your best players need to be your leaders and your leaders need to be your best players. Unfortunately, despite his best efforts, that ain't Trouba. You can't carry a bad player just for his leadership in a capped league.