I didn't see Blades of glory, so I can't say it is the worst, but it was pretty average. not as good as anchorman or ricky bobby
I went to see it on Sunday, some good laughs. Technically Talladega Nights, Blades of Glory and Semi-Pro aren't great, but I found them entertaining. I thought the same about Anchorman though, I just think Anchorman has more quotable lines which is why it's more popular.
Because I'm just working my notice here now and not actually doing any work, I did a little IMDB digging Old School - 6.9 Elf - 6.8 Anchorman - 6.8 Bewitched - 4.9 Curious George - 6.8 Talladega Nights - 6.5 Stranger Than Fiction - 7.9 Blades of Glory - 6.7 Semi-Pro - 6.1 Wedding Crashers - 7.2 (although he wasn't the main star in this) I've seen all these films and would probably agree that Stranger Than Fiction is his best film.