Peter Gray in Psychology Today argues that:
AP courses are generally cram courses, lacking intellectual depth.
Pressure to take AP courses is causing immense psychological harm.
AP courses don’t necessarily result in advanced placement or college credit.
There is little or no evidence that taking AP courses helps students perform well in college and diminishing evidence that it helps them get into college.
AP courses weaken the rest of a high school’s curriculum.
AP courses enrich the executives who head the College Board.
Read more here and find out more about Gray’s argument and why he thinks that.