I binged most of this show last year, but I kind of lost interest around season 9 - I guess knowing there was gonna be a whole season of "The Blur calls Lois at that one payphone and there's gonna be a whole Clark-Lois-The Blur love triangle" dampened my mood. I wonder how well this show would have been received if it wasn't explicitly a Superman property. Like can you imagine any other show spending seven and half seasons building up the two main character's Epic Romance, but then being like "just kidding this other woman is the End Game"
I don't know what they were trying to do with Jor El because he's all over the place, but then they also didn't know what they were doing with Lex because he spins wildly from "I'm literally the nicest person on this show" to "I'm have bad tendencies because of my abusive upbringing" to "I'm actually just pure evil and my father's abuse was him trying to stop me" and it's all just super unearned.
And speaking of unearned: Let's talk about Martha Kent's political career. Jonathan dies on election night, and the Governor offers her his seat even though he wasn't even sworn in. Then that US senator dies and the Governor is like "Lol you should go to Washington" and she does. She has never won an election, but she did hobnob with Metropolis's richest of the rich when she was pseudo-dating Lionel. It's corruption is what it is.
I skipped the Native American episode because I super wasn't in the mood for a "Magical Native Americans Who Can Turn Into Wolves Try To Protect Their Sacred Lands From Corporations" story, but then it turned out that episode introduced the Magical Prophecy Cave that was the actual foundation for like half the show. Oops!
Season 4: The witch season. Likely the second worst season of the show. Epic finale though.
The Witch season owns because everyone is incredibly chill about Lana being possessed by a Witch, half the conversations between Dean from Supernatural and Doctor Quinn from Doctor Quinn Medicine Woman don't make any sense because they're working together, the Witch depossessing Lana doesn't make sense because Dean is still alive at that point, and in the following season no one ever acknowledges that Dean died in the Kent's house during the Meteor Apocalypse. It also has that episode where Clark and Lana borrow Lionel's jet to follow Dean and Lex to China, as teenagers from a rural Kansas town do, and then The Witch pops out and there's a brief Crouching Tiger, Hidden Dragon fight between Lana and Clark.
Seasons 6-7: I thought 6 was a step back but still had some solid stuff. The Lana/Lex stuff was insane though. S7 is the worst season of the show, hands down. They mishandled Supergirl completely, the Lana stuff was horrendous, the writer's strike clearly forced them to rush through what should have been an epic final arc for Lex, etc.
My favorite part of this season was the revelation that Lionel was part of a secret society that knew about the Kryptonian coming and that he has literally always known that Clark was The Traveler, which retroactively makes everything that Lionel does in the first half of the season completely nonsensical.
(I think that really ill-advised illegal immigration episode was somewhere in one of these two seasons - remember the one with a young Tyler Posey, and the Meteor Freak Farmer who was burying people alive, and it's like, and Martha being all "I have to turn this kid in because he's here illegally I'm a Senator" and Clark is all "Um I was literally an illegal immigrant" and then Martha is all "Oh you right we should make exceptions for exceptional youths" and I'm over here like "Newsflash Martha all youths are exceptional and don't deserve to be deported!"
They somehow made the Doomsday thing kind of work, other than the disappointing finale and horrendous Jimmy Olsen plot twist.
that finale fucking owned
Still a solid ending though.
I haven't gotten back there yet, but I remember watching it when it actually aired and being really confused as to why Smallville was an in-universe comic and also why Clark and Lois were pretending not to be dating in the epilogue.