I HATED how they did Michael and Walt's characters.
They COMPLETELY took away the fact that Michael was forced into a corner and killed Anna Lucia and that other Cac chick to save Walt. They took a strong black father and turned him into a cowardly fool who only showed back up to get his ass beat and die without ANY resolution whatsoever or reconciliation with his son. Even Harold Perrineu called the shows producers out about that publicly.
Walt was set up to be a key component of the series, and one of the first mysteries (along with the smoke monster) that the show presented. What was the nature of his powers or gift? Why did he keep showing up to help Locke? What was the nature of his visions, the meaning of his connection with birds? WHAT was so "special" about him? They answered absolutely NOTHING.
And then that awful fukking cop out of a finale. shyt was awful, pure AWFUL. Jack's entire "Destiny" was to end up dying and bleeding alone on the island, with no answers.
The smoke-monster-as-Locke shyt took something that could've been interesting and made it lame and confusing for no reason. The Smoke monster was what, just pure evil incarnate that wanted to infect the world? The world is ALREADY infected with evil, that shyt isn't scary or even a good reason for someone to want to spend thousands of years "protecting" the island. Using the island as a time travel device was WAY more interesting of a thread than it being a "cork" for evil. That shyt is played.
The "spiritual" ending was a cop out, they didn't know what to do so they went with the "love conquers all, the journey was the most important lesson" route which was half assed and it showed.
They completely wasted three EXCELLENT seasons of superb storytelling. I wasnt even all that mad at season 4, and season 5 would be looked at more fondly had they stuck the landing with season 6. Season 6 had ONE flawless episode and that was the reveal of Richard Alpert's back story. Everything else was pure unadultered shyt.
And what's fukked up is that the show legitimately had some of the single best written and ACTED scenes I've ever seen on television, some really great acting and character moments that are now covered by the pile of shyt the show ended up being.
All of season one and the cast bonding
Michael and Walt's father-son bonding
Locke's backstory with his father
Sawyer being a dikk but trying to be nice to everyone when he thought he was gonna get exiled
Jack stepping up as the leader
Desmond's friendship with Charlie and trying to save him
Charlie's sacrifice
Claire giving birth
Michael killing Anna Lucia to save Walt
Ben's introduction
Locke's first encounter with Jacob and Ben shooting him
Mr Ecko looking the Smoke Monster in the eye and telling him to kiss his ass. "I ask NO forgiveness!"
Walt appearing and telling John to get up
Jack's WE HAVE TO GO BACK!!! Moment. One of the GREATEST twists in television history
Ben moving the island and looking towards the heavens saying "I Hope this makes you happy Jacob"
Hurley being Hurley
Sawyer falling in love with Juliet and finally putting someone else before himself
Jacob's FIRST introduction with the Man In Black before they were both reduced to p*ssys
Richard Alpert's back story
ALL pissed away
fukk LOST