He's still more or less right in Disney canon too. That's the whole problem with the sequel trilogy just hard resetting the entire narrative. If Luke Skywalker literally could not save the jedi in what was as close to a vacuum as you can realistically get, the jedi more or less don't deserve to return. It only got to this point because it was decided that literally every mistake Luke made in the EU regarding the NJO was essentially doubled down on. The New Republic is as well twice as bad because it's senators have gone from self serving and somtimes callous at the very worst, to now outright malicious at the worse and at the median as self serving and callous as Fey'lya and his goons were at their worst.

Meanwhile a handful of crazy people in uncharted wilderness built a mega death star and basically won the whole war with one shot. Even when they lost it their losses were far less than the actual death star losses in either case since nobody important died and everyone apparently got out without a scratch. Now on top of that they have super duper mega star destroyers and their ships of the line are double the size of an ISD. Hell, it took them like two weeks after Jakku to completley redesign the TIE fighter to completley shred OT era ships without it being a contest.

Why in gods name should anyone fight for the resistance? At best they're fighting for a system that's proven twice it's not worth saving. At worst they're just kind of aimlessly in this war for the sake of itself. There is literally nothing stopping the very next jedi candidate after Rey, if not Rey herself, from slaughtering the entire order for the third time in a century, if it's so easy to do it can be done offscreen by a guy who couldn't even make Jedi Knight before the age of thirty and lost to some girl who never had a lightsaber before in her life.