If relevance isn't a value judgement but is just based on what people think is relevant, then I think you're definitly wrong here. I remember it still being very popular with people I knew in college, and even after that I heard people who weren't even old enough to remember its release saying that it was one of their favorie movies (this was still a while ago, so they'd be late 20s, early 30s now. I don't know if new audiences continue to discover it or not in the last 10 years.
Btw, it also wasn't on the original TSP lists, so it would have entered in the late 2000s.
AMERICAN BEAUTY (Sam Mendes) ▪ 0 - 0 - 0 - 979 - 987 - 962 - 0 - 924 - 944 - 942 - 888 - 808 - 794 - 808 - 785 - 811 - 831 - 944
I haven't seen The Green Mile since it was fairly new, so who knows if I'd still like it, but I didn't think it was too long then and with it becoming normal for popcorn blockbusters to break 2.5 hours pretty regularly it probably seens less overlong now.
Re why I disliked Fight Club, I dunno, I've always found Brad Pitt off-putting and I think I just thought the characters were too douchy to be interested in. The people I went with didn't like it either, so that fed my dislike. I will say that I remember it instantly being popular with people I knew, so I was always surprised that it lost money.
I haven't seen it since opening weekend so I'm happy to walk in with a clean slate, but I still don't really like Brad Pitt in most things. The best balance of a performance of his that I actually enjoy in a movie that I actually like is Burn After Reading. My favorite thing he's been in is 12 Monkeys, but I don't like him in it.