People in Hollywood have had it in for Lucas since "THX-1138" and "American Graffetti". He was a maverick who wanted to do things his way and not the execs way. He's had issues with them dating back to those films. And with ANH, there were critics who just lamblasted the film. As time went on, certain critics were forced to reassess their review. Some did have positive reviews in the first place. But there were also a lot of negative ones. TESB, the one that is the favored of the OT, had some scathing reviews. Including ones by Pauline Kael, who loved everything Star Wars. Many have called Lucas and Speilberg the ones who destroyed cinema, with their big blockbuster films, like Jaws and Star Wars and Indiana Jones.