Mark Hamil actually hated Luke's character in the new movie and honestly you don't have to not have TDS in order to hate the new movies. Even many of the left crowd hated TLJ and some of the movies.
Hamil is still a jackass for some of the stuff he did, like yelling at Trump's grandkids for dressing up in star wars costumes but he also hated the new movies iirc.
There's a lot to hate. You pretty much have to be an iconoclast to like
The Last Jedi, while
The Force Awakens is firmly rooted in the whole Hollywood "nostalgia is solid money, so just recast old stories with new actors and change the lines a bit." Which I absolutely despise. I've been rewatching a lot of the old 60s and 70s shows, like
Mission: Impossible (which is gold) or
M*A*S*H, and they absolutely should not be remade. You can't. It's why I hate JJ Abrams' Star Trek. You do it right, once, and walk away.
That's doubly important when you've left so much to the imagination through books. Given how many works and how much imagination fans threw into what happened after Death Star II: Electric Boogaloo went kaboomy, sequels were a bloody minefield. Especially clean slate ones. Everybody had their own vision of post-Endor, and there's so much great stuff (and awful stuff) in the EU, lots of folks were gonna be dissatisfied unles Star Wars VII, VIII and IX were Timothy Zahn's Thrawn Trilogy. Living up to the hype was going to be very hard. Disney would have been much wiser sticking to
Rogue One-esque gapfillers. Though Disney did blow that with the Vader fan-service and the whole
Tantive IV at Scarif bit, when they absolutely could have had a Secret Agent Sith, 00-Vader spy movie in space covering Scarif to Tattoine.
That would have been spectacular.