lost it's way about halfway through unfortunately

it's really weird because the first about 45 minutes were good, but then it got boring and never let up until about the last 10 minutes, so that was really disappointing. and that's a rare thing because about 90% of movies that start off good in the first 30 minutes or more stay good for the rest of the movie, this movie just totally went off track and into a different feel and into boring things happening after the first about 45 minutes. anyone else notice this distinct and radical change in the entertainment level of this movie?