Here you say +/- is meaningless, how so? Its a stat that is used to give a context.
At the extreme any stat with no context can be seen as useless.
Bedard is bad defensively, hes often lazy, skates heavy, late on a defensive play, does not back check very hard.
His desire to win and be the best is missing from his game. Hes so soft with his stick and has no aggressiveness. <—— this is the main cause of his bad +/-
Koivu, Subban they fought every game, they were on the ice giving it all. Usually players like these are a net positive to their teams and no one is wondering if they should be playing with different teammates every game. Koivu specially played on worst teams than Bedard.
Theres no excuses for Bedard, he was overhyped, overrated and totally miss managed by the nhl.