I wouldn't think that it's "just you" ... I mean, you experienced what you experienced, right?
But I'm happy to report that I had a very different experience during my recent Feb. 7 - 14 trip. We had the best luck with buses during this trip than we did during our May 2005 and November 2006 trips.
We joked that we stayed Saturday to Saturday and it took until quite literally Thursday that we had to wait more than 2 or 3 minutes for a bus, boat or monorail. I realize that isn't "normal," but it was sooooo consistent that way across so many days in a row. We were so spoiled. On that Thursday morning, we waited about 15 minutes for an Animal Kingdom bus, while 3 Downtown Disney buses and 3 Hollywood Studios buses passed us by (I counted). We realized how spoiled we were at feeling antsy waiting 15 minutes for a bus, especially when they are supposed to run every 15-20 minutes.
Like I said, I realize our experience can't be considered average or normal, but WOW was it great!
I need to add, however, that we never tried to catch a bus after fireworks or a park closing. We stayed at Polynesian, so we had the monorail from MK and Epcot. And the night we saw Fantasmic at Hollywood Studios was an EMH night and we stayed and played for a while after the show, and thus we didn't leave the park the same exact time as multi-thousands of other people.
We also didn't use buses to go from resort to resort. We took a taxi from Poly to Yacht Club for an IllumiNations cruise, and after the cruise we also took a taxi back. We did no other resort-to-resort travel, except for Contemporary to Poly via the monorail.