I've only read
Red Storm Rising and
Debt of Honor. Both were good reads and were "page turners", which Clancy was very good at. You're never going to mistake them for great literature, but
Red October, from what I understand, is the one that gets closest to being a true work of serious fiction. I could say something similar about other "hackneyed" writers like Dean Koontz or Michael Crichton.
"Red Storm Rising" is my favorite, and with the recent current events it's also a little prophetic...
Well...it was set during the Cold War when the USSR tries to attack the West due to having screwed up their own economy, and the premise is just a
wee bit contrived (in the end, it was probably overdetermined that the USSR would go away with a whimper rather than start WW3). It's basically
Red Dawn but not quite as absurd, and I don't think it has much intersection with Putin's current awful war. That said, it's a fun read, and my take on literature or any other form of media is that at the very least, it has to make you enjoy experiencing it on some level. If it can't do that, what's the point?