What? are we supposed to blame the actors who obviously did a good performance for the shitty guion now? Bullshit!!!! there are been a ton of actors who had passed for drug problems and overcome it, if something is a very hard and respectable fight. And while Mark Hamill most iconic performance he got several jobs and got a good amount of awards not just as actor, but also in games and cartoons, trying to labeled of "nobody" just to excuse shitty disney corporatives, is low (or maybe ignorant), he could have represented a very dignified character if Disney had not insisted in mocking him to make Rey look better.
The biggest issue is that they tried to fund their new cast mocking the old one, if they were treating the old cast with some respect and made and adequate coherent pass the torch before doing their new original history all will be feel more organic. But instead they overwrite any victory made in the first six movies and try to refilm the same plot, just this time with Rey as a "new and more powerful and wise" Luke, and by that, they have to destroy any legalicy that the original trio had made and make them look as morons who forgot all they character development from the previous three movies.