I loved the Scully/Mulder dynamic of the early years (particularly the episodes with a bit of humor to them), but when Duchovny left, it just never had the same draw for me.
I watched the first couple of episodes last year, but for me the magic was gone. Too bad.
It was appointment TV for me in the 90s.
I'm not saying the first movie killed the show (I actually rather liked the first movie), but the show just wasn't the same following the movie. I really didn't like the "discipline" angle where they were always having to sneak around, and then Mulder was abducted at the end of the season. It's funny - I always assumed me being busy my sophomore year at ISU was the reason why I drifted away from the show, but in retrospect, after binging the show a few years back, it had actually started going downhill right around then.
As far as last season, I don't necessarily think the magic is gone because it was a good season. But first, it has been 15 or so years since the original run ended, and besides a second movie, we knew very little about these characters anymore, and while they tried to catch us up, they're still kind of strangers. Second, there was very little memorable about last season. To this day I still remember particular episodes - Darkness Falls and Tooms (s1), Humbug (s2), Clyde Bruckman's Final Repose, 2Shy, and Syzygy (s3), Home (s4), Unusual Suspects, Detour, Chinga, Bad Blood (s5), and all those episodes have something in common - they're all "Monster of the Week" episodes disconnected from the overarching story arc. Everything about last season was story arc.