If you were closer to Bart's age when the show came out, and closer to Homer's age now; you likely remember the golden age of The Simpsons.
Watching this marathon you can really see how the show gradually changed over time. IMO the best episodes were from the debut up until about 1997. There's an episode on now where Bart divorces his parents. It's feels unnatural, kind of obnoxious and frustrating the way it unfolds, and it's so unrealistic.
What episode did you see that began the decline (if you believe it declined)?
90's were good, 00's were poorly written, what episode did you hate first>