I thought it was more like the ghost written ones- at least Greaney's, which are pretty good. To that end, I'm wondering why they didn't just make the show for Jack Ryan Jr. instead of Sr. The timeline would be correct, as would the fact that Jr. is a financial guy who morphs into a field operative. He also answers to Clark- who is a lot more like the TV show's Greer than the books' Greer. The other characters of "The Campus" could have been written in seamlessly too.
As for the show, I liked it enough to have finished it quickly but only, I think, because I mentally dissociated it with the Clancy universe after a few episodes. I knew when they set it current day that it wasn't going to be super true to the books but I guess I was hoping for something closer to what Amazon did with Michael Connelly's Bosch series, where plenty of concessions are made but the core personalities and story-lines are true to the novels and woven together nicely.