I love breakfast food but Denny's is maybe the worst chain in America.
Same. I'm a huge fan of the big American breakfast and particularly diner-style breakfast food. Sadly, Denny's is entirely unsatisfying. There were a few places in Cali that I liked, such as Uncle Bill's and Stacks, but they were charging a surprising amount of money for pancakes, eggs, bacon, and mediocre coffee. Like getting out of there for just under $20 after tax and tip. Seems steep, but occasionally it's worth it to have someone else make the mess and clean it up for you.
But not Denny's.
The only good Denny's I ever went to was on Waikiki beach, on a corner facing the ocean, right next to the park. The 2nd floor had a perfect view of the ocean. It was amazing. Made the food taste better. Last time I went, that Denny's was gone.