I used to say "I've never been to a national park and wondered why it's a national park - they all have an obvious and immediate majesty to them."
Then I went to Pinnacles, and Acadia. I'd honestly forgotten about Pinnacles until I started writing this comment. It's also one of the newest parks, so even though it was underwhelming, it didn't impede my belief in park majesty.
Acadia, though, just doesn't have the magic. It's an island, which is strange because that means there's a town in the park where people live. Honestly I think I liked the coffee shop I had breakfast in more than the rest of the park. There's a summit you can take photos from and a hike that goes along the rim of the island. That seemed to be it. As a West Coast boy, it didn't have the same specialness as the other parks I've seen. Even my Mainer friends say "we don't know why Acadia is a park - there are so many other places in Maine that are at least as pretty."
If this guy thinks Yosemite, Zion, Arches, and the Grand Canyon are among America's worst parks, he's bonkers or trolling.