It's probably been 5 years since I last went. Over time, annual passes became less worth it. Prices kept going up and more dates kept getting blocked out. Even ordinary tickets got pricey. Eventually, the park got so crowded that it really wasn't fun to go. Then they added premiums to a bunch of things like Fast Passes. I just kind of said screw it and chose not to go back.
I'm sure that I'll go back for some reason, but I won't make an effort to. This is coming from someone who LOVED Disneyland and wanted to build theme park rides as a dream job. It ended up feeling like they were doing everything they could to squeeze pennies, which I know theme parks are designed to do, but it used to seem like Disneyland at least partly cared about whether or not you were enjoying yourself. Cast members, at one time, were pretty damned friendly, though they're still much better than most other theme parks. When I last went, you could tell that they secretly hated their jobs. I don't want to pity lowly employees when I'm there to have fun. At least Six Flags doesn't seriously attempt to make their employees act cheery(I was once an employee there BTW).
Above all, I really don't want to give Disney money. Sure, they became an Evil MegaCorp a long time ago, and have long ago slithered their tentacles through the news and entertainment industry, but they control so much now and pretty much have no regard for artistry or the cultural significance of their films and characters. Star Wars just took the cake. Why would I pay Disney for a bizarro facsimile something I enjoyed as a child where the characters I loved are losers only to be replaced by modern ripoffs? Maybe they could have attracted a new generation, which doesn't appear to be working out much for them, but as someone who grew up with the original Star Wars, what they've done only repels me from anything to do with them. I'm not even a Star Wars fan... and I don't think one has to be to respond that way to Disney.
I'm not angry at Disney. It's just that, looking at my own behavior, it's no surprise to me why attendance to their park would be in decline.