I got bored with the UFO aspect almost from the start, lost track of the conspiracy, and quit watching those episodes. I really enjoyed almost all the episodes that didn’t deal with aliens though. It was like two separate shows.
That is one of the strange things about the X-Files, the show is famous for the conspiracy/UFO arch but really the best episodes are almost always stand alone stuff with no conspiracy no UFO and no connection to the “mystery”. When I think of good X-Files episodes I think of ones like Tooms and Attack of the Coporofages (however the heck that’s spelled) and Jose Chung.